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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:45:48,139 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:45:48,142 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:45:48,156 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:45:48,156 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:45:48,157 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:45:48,158 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:45:48,160 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:45:48,161 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:45:48,162 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:45:48,163 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:45:48,163 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:45:48,165 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:45:48,167 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:45:48,168 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:45:48,168 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:45:48,171 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:45:48,174 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:45:48,176 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:45:48,177 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:45:48,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:45:48,180 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:45:48,182 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 21:45:48,182 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 21:45:48,183 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 21:45:48,184 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 21:45:48,184 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 21:45:48,185 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 21:45:48,186 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 21:45:48,187 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 21:45:48,187 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 21:45:48,188 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 21:45:48,188 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 21:45:48,189 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 21:45:48,190 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 21:45:48,190 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 21:45:48,191 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:45:48,221 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:45:48,221 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:45:48,222 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:45:48,222 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:45:48,223 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:45:48,223 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:45:48,223 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:45:48,223 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:45:48,224 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:45:48,224 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:45:48,224 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:45:48,224 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:45:48,226 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:45:48,226 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:45:48,226 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:45:48,226 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:45:48,226 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:45:48,227 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:45:48,227 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:45:48,227 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:45:48,227 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:45:48,229 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:45:48,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:45:48,229 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:45:48,229 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:45:48,230 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:45:48,230 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:45:48,230 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:45:48,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:45:48,231 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:45:48,231 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:45:48,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:45:48,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:45:48,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:45:48,317 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:45:48,318 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:45:48,318 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-09-26 21:45:48,319 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-09-26 21:45:48,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:45:48,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:45:48,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:48,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:45:48,372 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:45:48,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:45:48,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:45:48,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:45:48,412 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:45:48,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/1) ... [2018-09-26 21:45:48,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:45:48,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:45:48,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:45:48,433 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:45:48,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (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 [2018-09-26 21:45:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:45:48,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:45:48,697 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:45:48,697 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:48 BoogieIcfgContainer [2018-09-26 21:45:48,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:45:48,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:45:48,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:45:48,702 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:45:48,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:45:48" (1/2) ... [2018-09-26 21:45:48,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a615f57 and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:45:48, skipping insertion in model container [2018-09-26 21:45:48,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:45:48" (2/2) ... [2018-09-26 21:45:48,706 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-09-26 21:45:48,716 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:45:48,724 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:45:48,774 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:45:48,775 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:45:48,776 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:45:48,776 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:45:48,776 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:45:48,776 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:45:48,776 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:45:48,777 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:45:48,777 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:45:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:45:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:45:48,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:48,797 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:45:48,798 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:48,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:45:48,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:48,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:48,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:48,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:48,945 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:45:48,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:45:48,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:45:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:45:48,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:48,964 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:45:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:49,143 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:45:49,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:45:49,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:45:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:49,160 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:49,160 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:45:49,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:45:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:45:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:45:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:45:49,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:45:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:49,207 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:45:49,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:45:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:45:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:45:49,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:49,208 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:45:49,209 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:49,209 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:45:49,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:49,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:49,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:49,309 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:49,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:49,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:45:49,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:45:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:45:49,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:49,475 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:45:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:49,550 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:45:49,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:45:49,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:45:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:49,554 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:45:49,554 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:45:49,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:45:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:45:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:45:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:45:49,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:45:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:49,560 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:45:49,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:45:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:45:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:45:49,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:49,562 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:45:49,563 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:49,563 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:49,563 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:45:49,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:49,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:49,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:49,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:49,646 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:49,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:49,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:49,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:49,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:49,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:45:49,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:45:49,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:45:49,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:49,822 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:45:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:49,929 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:45:49,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:45:49,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:45:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:49,932 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:45:49,932 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:45:49,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:45:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:45:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:45:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:45:49,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:45:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:49,936 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:45:49,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:45:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:45:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:45:49,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:49,937 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:45:49,937 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:49,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:45:49,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:49,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:49,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:49,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,204 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:50,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:50,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:45:50,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:50,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:50,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:45:50,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:45:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:45:50,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:50,325 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:45:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:50,395 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:45:50,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:45:50,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:45:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:50,398 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:45:50,399 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:45:50,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:45:50,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:45:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:45:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:45:50,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:45:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:50,403 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:45:50,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:45:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:45:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:45:50,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:50,404 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:45:50,404 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:50,405 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:45:50,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:50,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:50,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:50,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:50,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:50,523 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:50,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:50,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:50,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:45:50,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:45:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:45:50,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:50,684 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:45:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:50,758 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:45:50,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:45:50,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:45:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:50,761 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:45:50,761 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:45:50,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:45:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:45:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:45:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:45:50,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:45:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:50,765 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:45:50,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:45:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:45:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:45:50,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:50,767 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:45:50,767 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:50,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:45:50,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:50,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:50,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:50,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:50,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:50,889 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:50,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:50,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:45:50,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:50,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:51,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:45:51,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:45:51,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:45:51,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:51,011 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:45:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,479 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:45:51,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:45:51,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:45:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,482 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:45:51,483 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:45:51,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:45:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:45:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:45:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:45:51,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:45:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,487 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:45:51,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:45:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:45:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:45:51,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,489 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:45:51,489 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,492 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:45:51,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:51,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:51,626 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:51,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:51,659 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:45:51,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:51,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:51,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:51,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:45:51,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:45:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:45:51,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:51,767 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:45:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,896 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:45:51,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:45:51,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:45:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,898 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:45:51,898 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:45:51,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:45:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:45:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:45:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:45:51,904 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:45:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,904 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:45:51,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:45:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:45:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:45:51,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,905 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:45:51,905 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:45:51,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:51,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:52,036 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:52,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:52,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:45:52,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:45:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:45:52,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:52,279 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:45:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:52,344 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:45:52,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:45:52,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:45:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:52,349 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:45:52,349 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:45:52,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:45:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:45:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:45:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:45:52,354 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:45:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:52,354 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:45:52,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:45:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:45:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:45:52,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:52,355 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:45:52,355 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:52,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:45:52,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:52,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:52,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:52,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:52,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:52,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:52,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:52,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:52,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:53,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:45:53,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:45:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:45:53,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:53,073 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:45:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:53,206 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:45:53,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:45:53,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:45:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:53,207 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:45:53,208 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:45:53,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:45:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:45:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:45:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:45:53,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:45:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:53,213 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:45:53,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:45:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:45:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:45:53,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:53,214 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:45:53,214 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:53,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:45:53,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:53,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:53,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:53,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:53,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:53,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:53,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:45:53,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:53,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:53,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:45:53,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:45:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:45:53,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:53,557 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-26 21:45:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:53,641 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:45:53,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:45:53,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:45:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:53,644 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:45:53,644 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:45:53,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:45:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:45:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:45:53,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:45:53,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:45:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:53,650 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:45:53,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:45:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:45:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:45:53,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:53,651 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:45:53,651 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:53,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-26 21:45:53,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:53,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:53,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:53,795 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:53,803 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:53,818 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:53,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:53,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:53,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:53,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:45:53,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:45:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:45:53,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:53,938 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-26 21:45:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:54,015 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:45:54,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:45:54,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:45:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:54,017 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:45:54,017 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:45:54,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:45:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:45:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:45:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:45:54,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:45:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:54,022 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:45:54,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:45:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:45:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:45:54,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:54,023 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:45:54,023 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:54,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-26 21:45:54,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:54,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:54,200 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:54,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:54,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:45:54,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:54,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:54,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:45:54,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:45:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:45:54,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:54,727 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-26 21:45:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:55,846 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:45:55,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:45:55,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:45:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:55,849 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:45:55,849 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:45:55,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:45:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:45:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:45:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:45:55,854 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:45:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:55,855 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:45:55,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:45:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:45:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:45:55,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:55,856 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:45:55,856 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:55,856 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-26 21:45:55,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:55,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:55,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:55,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:55,995 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:56,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:56,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:45:56,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:56,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:56,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:56,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:45:56,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:45:56,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:45:56,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:56,279 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-26 21:45:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:56,614 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:45:56,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:45:56,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:45:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:56,618 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:45:56,619 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:45:56,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:45:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:45:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:45:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:45:56,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:45:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:56,628 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:45:56,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:45:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:45:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:45:56,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:56,630 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:45:56,630 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:56,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-26 21:45:56,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:56,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:56,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:56,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:56,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:56,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:56,793 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:56,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:56,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:56,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:56,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:45:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:45:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:45:56,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:56,955 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-26 21:45:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:57,165 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:45:57,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:45:57,166 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:45:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:57,166 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:45:57,167 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:45:57,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:45:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:45:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:45:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:45:57,176 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:45:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:57,176 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:45:57,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:45:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:45:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:45:57,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:57,177 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:45:57,178 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:57,178 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-26 21:45:57,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:57,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:57,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:57,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:57,540 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:57,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:57,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:57,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:57,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:57,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:57,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:45:57,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:45:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:45:57,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:57,667 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-26 21:45:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:57,874 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:45:57,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:45:57,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:45:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:57,875 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:45:57,875 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:45:57,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:45:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:45:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:45:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:45:57,880 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:45:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:57,881 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:45:57,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:45:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:45:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:45:57,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:57,882 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:45:57,882 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:57,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:57,883 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-26 21:45:57,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:57,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:57,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:57,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:58,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:58,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:58,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:45:58,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:58,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:58,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:45:58,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:45:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:45:58,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:58,526 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-26 21:45:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:58,652 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:45:58,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:45:58,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:45:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:58,655 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:45:58,656 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:45:58,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:45:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:45:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:45:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:45:58,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-26 21:45:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:58,661 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:45:58,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:45:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:45:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:45:58,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:58,662 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-26 21:45:58,662 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:58,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-26 21:45:58,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:58,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:58,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:58,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:59,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:59,556 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:45:59,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:59,610 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:59,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:59,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:00,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:46:00,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:46:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:46:00,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:00,436 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-26 21:46:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:00,624 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:46:00,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:46:00,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:46:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:00,625 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:46:00,625 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:46:00,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:46:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:46:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:46:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:46:00,631 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-26 21:46:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:00,631 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:46:00,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:46:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:46:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:46:00,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:00,633 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-26 21:46:00,633 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:00,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-26 21:46:00,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:00,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:00,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:00,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:00,871 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:00,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:00,928 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:46:00,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:00,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:01,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:01,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:46:01,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:46:01,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:46:01,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:01,290 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-26 21:46:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:01,451 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:46:01,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:46:01,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:46:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:01,452 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:46:01,453 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:46:01,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:46:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:46:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:46:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:46:01,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-26 21:46:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:01,459 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:46:01,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:46:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:46:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:46:01,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:01,460 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-26 21:46:01,460 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:01,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-26 21:46:01,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:01,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:01,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:01,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:01,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:01,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:01,610 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:01,618 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:01,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:46:01,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:01,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:02,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:02,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:46:02,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:46:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:46:02,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:02,144 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-26 21:46:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:02,423 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:46:02,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:46:02,423 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:46:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:02,424 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:46:02,424 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:46:02,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:46:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:46:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:46:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:46:02,430 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-26 21:46:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:02,430 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:46:02,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:46:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:46:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:46:02,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:02,431 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-26 21:46:02,431 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:02,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-26 21:46:02,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:02,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:02,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:02,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:02,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:02,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:02,622 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:02,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:02,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:02,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:02,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:46:02,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:46:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:46:02,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:02,906 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-26 21:46:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:03,196 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:46:03,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:46:03,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:46:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:03,197 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:46:03,198 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:46:03,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:46:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:46:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:46:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:46:03,204 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-26 21:46:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:03,204 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:46:03,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:46:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:46:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:46:03,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:03,206 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-26 21:46:03,206 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:03,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-26 21:46:03,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:03,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:03,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:03,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:03,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:04,075 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:04,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:04,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:04,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:04,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:04,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:46:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:46:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:46:04,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:04,265 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-26 21:46:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:04,399 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:46:04,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:46:04,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:46:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:04,400 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:46:04,401 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:46:04,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:46:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:46:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:46:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:46:04,405 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-26 21:46:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:04,405 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:46:04,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:46:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:46:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:46:04,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:04,406 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-26 21:46:04,406 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:04,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-26 21:46:04,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:04,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:04,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:04,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:04,576 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:04,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:04,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:46:04,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:04,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:04,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:04,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:46:04,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:46:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:46:04,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:04,771 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-26 21:46:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:04,975 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:46:04,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:46:04,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:46:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:04,977 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:46:04,978 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:46:04,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:46:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:46:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:46:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:46:04,982 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-26 21:46:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:04,982 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:46:04,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:46:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:46:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:46:04,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:04,983 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-26 21:46:04,983 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:04,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-26 21:46:04,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:04,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:04,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:04,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:05,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:05,361 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:05,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:05,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:05,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:05,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:05,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:05,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:46:05,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:46:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:46:05,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:05,560 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-26 21:46:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:05,926 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:46:05,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:46:05,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:46:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:05,927 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:46:05,928 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:46:05,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:46:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:46:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:46:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:46:05,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-26 21:46:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:05,933 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:46:05,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:46:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:46:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:46:05,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:05,934 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-26 21:46:05,934 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:05,934 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-26 21:46:05,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:05,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:06,255 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:06,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:06,354 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:46:06,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:06,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:06,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:46:06,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:46:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:46:06,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:06,493 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-26 21:46:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:06,943 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:46:06,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:46:06,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:46:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:06,944 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:46:06,944 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:46:06,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:46:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:46:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:46:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:46:06,947 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-26 21:46:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:06,947 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:46:06,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:46:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:46:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:46:06,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:06,949 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-26 21:46:06,949 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:06,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-26 21:46:06,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:06,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:06,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:06,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:07,216 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:07,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:07,285 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:46:07,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:07,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:07,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:46:07,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:46:07,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:46:07,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:07,478 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-26 21:46:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:07,637 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:46:07,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:46:07,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:46:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:07,638 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:46:07,638 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:46:07,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:46:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:46:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:46:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:46:07,641 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-26 21:46:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:07,641 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:46:07,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:46:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:46:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:46:07,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:07,643 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-26 21:46:07,643 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:07,643 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-26 21:46:07,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:07,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:07,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:07,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:07,908 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:07,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:08,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:08,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:46:08,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:46:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:46:08,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:08,162 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-26 21:46:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:08,479 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:46:08,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:46:08,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:46:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:08,480 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:46:08,480 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:46:08,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:46:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:46:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:46:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:46:08,483 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-26 21:46:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:08,483 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:46:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:46:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:46:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:46:08,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:08,484 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-26 21:46:08,484 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:08,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-26 21:46:08,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:08,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:09,203 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:09,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:09,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:09,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:09,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:09,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:46:09,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:46:09,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:46:09,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:09,423 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-26 21:46:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:09,582 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:46:09,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:46:09,582 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:46:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:09,583 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:46:09,583 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:46:09,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:46:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:46:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:46:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:46:09,586 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-26 21:46:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:09,587 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:46:09,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:46:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:46:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:46:09,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:09,588 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-26 21:46:09,588 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:09,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-26 21:46:09,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:09,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:09,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:09,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:09,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:09,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:09,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:09,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:46:09,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:09,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:10,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:46:10,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:46:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:46:10,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:10,147 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-26 21:46:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:10,384 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:46:10,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:46:10,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:46:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:10,386 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:46:10,386 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:46:10,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:46:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:46:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:46:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:46:10,389 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-26 21:46:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:10,389 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:46:10,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:46:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:46:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:46:10,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:10,390 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-26 21:46:10,391 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:10,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-26 21:46:10,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:10,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:10,651 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:10,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:10,686 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:10,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:10,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:10,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:10,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:46:10,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:46:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:46:10,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:10,852 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-26 21:46:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:11,107 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:46:11,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:46:11,107 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:46:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:11,108 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:46:11,108 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:46:11,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:46:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:46:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:46:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:46:11,111 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-26 21:46:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:46:11,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:46:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:46:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:46:11,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:11,112 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-26 21:46:11,112 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:11,112 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-26 21:46:11,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:11,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:11,372 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:11,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:11,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:46:11,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:11,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:11,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:46:11,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:46:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:46:11,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:11,729 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-26 21:46:11,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:11,877 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:46:11,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:46:11,878 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:46:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:11,879 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:46:11,879 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:46:11,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:46:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:46:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:46:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:46:11,883 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-26 21:46:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:11,883 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:46:11,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:46:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:46:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:46:11,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:11,883 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-26 21:46:11,884 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:11,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:11,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-26 21:46:11,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:11,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:11,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:11,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:12,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:12,336 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:12,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:12,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:46:12,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:12,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:12,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:12,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:46:12,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:46:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:46:12,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:12,618 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-26 21:46:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:12,770 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:46:12,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:46:12,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:46:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:12,771 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:46:12,771 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:46:12,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:46:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:46:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:46:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:46:12,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-26 21:46:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:12,774 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:46:12,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:46:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:46:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:46:12,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:12,775 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-26 21:46:12,775 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:12,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-26 21:46:12,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:12,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:12,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:12,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:13,158 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:13,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:13,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:13,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:46:13,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:46:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:46:13,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:13,560 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-26 21:46:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:13,761 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:46:13,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:46:13,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:46:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:13,762 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:46:13,763 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:46:13,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:46:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:46:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:46:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:46:13,766 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-26 21:46:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:13,766 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:46:13,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:46:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:46:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:46:13,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:13,767 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-26 21:46:13,767 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:13,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-26 21:46:13,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:13,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:13,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:13,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:14,016 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:14,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:14,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:14,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:14,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:14,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:46:14,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:46:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:46:14,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:14,281 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-26 21:46:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:14,498 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:46:14,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:46:14,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:46:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:14,499 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:46:14,499 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:46:14,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:46:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:46:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:46:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:46:14,503 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-26 21:46:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:14,504 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:46:14,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:46:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:46:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:46:14,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:14,504 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-26 21:46:14,505 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:14,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-26 21:46:14,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:14,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:14,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:14,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:14,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:14,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:14,780 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:14,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:14,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:46:14,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:14,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:15,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:46:15,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:46:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:46:15,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:15,070 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-26 21:46:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:15,257 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:46:15,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:46:15,258 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:46:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:15,259 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:46:15,259 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:46:15,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:46:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:46:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:46:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:46:15,261 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-26 21:46:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:15,262 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:46:15,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:46:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:46:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:46:15,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:15,262 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-26 21:46:15,263 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:15,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-26 21:46:15,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:15,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:15,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:15,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:15,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:15,496 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:15,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:15,534 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:15,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:15,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:15,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:15,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:46:15,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:46:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:46:15,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:15,767 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-26 21:46:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:16,040 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:46:16,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:46:16,040 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:46:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:16,041 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:46:16,041 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:46:16,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:46:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:46:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:46:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:46:16,044 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-26 21:46:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:16,044 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:46:16,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:46:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:46:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:46:16,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:16,045 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-26 21:46:16,045 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:16,046 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:16,046 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-26 21:46:16,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:16,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:16,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:16,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:16,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:16,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:16,632 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:16,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:16,929 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:46:16,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:16,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:17,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:17,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:46:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:46:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:46:17,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:17,125 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-26 21:46:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:17,353 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:46:17,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:46:17,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:46:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:17,354 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:46:17,354 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:46:17,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:46:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:46:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:46:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:46:17,356 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-26 21:46:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:17,356 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:46:17,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:46:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:46:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:46:17,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:17,357 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-26 21:46:17,357 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:17,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-26 21:46:17,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:17,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:17,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:17,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:17,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:17,768 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:17,776 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:17,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:46:17,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:17,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:18,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:18,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:46:18,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:46:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:46:18,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:18,610 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-26 21:46:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:18,865 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:46:18,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:46:18,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:46:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:18,867 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:46:18,867 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:46:18,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:46:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:46:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:46:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:46:18,870 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-26 21:46:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:18,870 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:46:18,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:46:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:46:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:46:18,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:18,871 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-26 21:46:18,871 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:18,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-26 21:46:18,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:18,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:18,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:18,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:18,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:19,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:19,193 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:19,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:19,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:19,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:19,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:46:19,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:46:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:46:19,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:19,431 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-26 21:46:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:19,714 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:46:19,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:46:19,715 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:46:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:19,716 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:46:19,716 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:46:19,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:46:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:46:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:46:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:46:19,719 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-26 21:46:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:19,720 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:46:19,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:46:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:46:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:46:19,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:19,721 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-26 21:46:19,721 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:19,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-26 21:46:19,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:19,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:19,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:19,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:20,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:20,776 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:20,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:20,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:20,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:20,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:21,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:21,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:46:21,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:46:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:46:21,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:21,019 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-26 21:46:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:21,283 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:46:21,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:46:21,285 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:46:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:21,286 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:46:21,286 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:46:21,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:46:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:46:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:46:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:46:21,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-26 21:46:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:46:21,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:46:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:46:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:46:21,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:21,291 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-26 21:46:21,291 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:21,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-26 21:46:21,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:21,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:21,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:21,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:21,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:21,674 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:21,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:21,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:46:21,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:21,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:22,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:22,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:46:22,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:46:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:46:22,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:22,046 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-26 21:46:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:22,278 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:46:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:46:22,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:46:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:22,279 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:46:22,279 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:46:22,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:46:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:46:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:46:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:46:22,281 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-26 21:46:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:22,281 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:46:22,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:46:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:46:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:46:22,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:22,282 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-26 21:46:22,282 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:22,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-26 21:46:22,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:22,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:22,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:22,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:22,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:22,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:22,935 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:22,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:22,998 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:22,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:23,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:23,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:23,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:46:23,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:46:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:46:23,638 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:23,639 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-26 21:46:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:24,188 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:46:24,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:46:24,188 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:46:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:24,189 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:46:24,189 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:46:24,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:46:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:46:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:46:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:46:24,193 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-26 21:46:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:24,193 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:46:24,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:46:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:46:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:46:24,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:24,194 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-26 21:46:24,194 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:24,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-26 21:46:24,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:24,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:24,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:24,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:24,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:24,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:24,590 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:24,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:25,102 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:46:25,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:25,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:25,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:25,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:46:25,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:46:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:46:25,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:25,436 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-26 21:46:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:25,721 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:46:25,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:46:25,722 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:46:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:25,722 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:46:25,722 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:46:25,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:46:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:46:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:46:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:46:25,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-26 21:46:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:25,726 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:46:25,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:46:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:46:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:46:25,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:25,727 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-26 21:46:25,727 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:25,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-26 21:46:25,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:25,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:25,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:25,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:25,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:26,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:26,027 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:26,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:46:26,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:26,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:26,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:26,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:46:26,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:46:26,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:46:26,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:26,476 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-26 21:46:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:26,668 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:46:26,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:46:26,668 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:46:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:26,669 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:46:26,669 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:46:26,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:46:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:46:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:46:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:46:26,672 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-26 21:46:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:26,672 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:46:26,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:46:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:46:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:46:26,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:26,673 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-26 21:46:26,673 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:26,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-26 21:46:26,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:26,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:26,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:26,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:26,962 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:26,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:27,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:27,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:27,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:46:27,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:46:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:46:27,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:27,217 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-26 21:46:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:27,533 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:46:27,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:46:27,533 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:46:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:27,534 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:46:27,534 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:46:27,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:46:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:46:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:46:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:46:27,537 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-26 21:46:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:27,537 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:46:27,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:46:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:46:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:46:27,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:27,538 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-26 21:46:27,538 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:27,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-26 21:46:27,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:27,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:27,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:27,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:27,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:27,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:27,878 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:27,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:27,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:27,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:27,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:28,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:28,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:46:28,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:46:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:46:28,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:28,412 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-26 21:46:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:28,972 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:46:28,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:46:28,972 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:46:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:28,973 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:46:28,973 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:46:28,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:46:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:46:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:46:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:46:28,977 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-26 21:46:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:28,977 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:46:28,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:46:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:46:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:46:28,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:28,978 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-26 21:46:28,978 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:28,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-26 21:46:28,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:28,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:28,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:28,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:29,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:29,339 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:29,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:29,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:46:29,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:29,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:29,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:29,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:46:29,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:46:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:46:29,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:29,821 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-26 21:46:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:30,088 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:46:30,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:46:30,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:46:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:30,089 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:46:30,089 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:46:30,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:46:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:46:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:46:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:46:30,092 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-26 21:46:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:30,092 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:46:30,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:46:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:46:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:46:30,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:30,092 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-26 21:46:30,093 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:30,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-26 21:46:30,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:30,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:30,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:30,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:30,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:30,598 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:30,605 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:30,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:30,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:30,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:30,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:30,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:46:30,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:46:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:46:30,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:30,899 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-26 21:46:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:31,239 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:46:31,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:46:31,239 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:46:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:31,240 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:46:31,240 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:46:31,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:46:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:46:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:46:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:46:31,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-26 21:46:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:31,243 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:46:31,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:46:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:46:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:46:31,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:31,243 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-26 21:46:31,243 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:31,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-26 21:46:31,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:31,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:31,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:31,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:31,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:31,661 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:31,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:32,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:46:32,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:32,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:32,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:32,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:46:32,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:46:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:46:32,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:32,748 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-26 21:46:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:33,030 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:46:33,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:46:33,031 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:46:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:33,031 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:46:33,031 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:46:33,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:46:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:46:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:46:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:46:33,034 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-26 21:46:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:33,035 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:46:33,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:46:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:46:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:46:33,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:33,036 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-26 21:46:33,036 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:33,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-26 21:46:33,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:33,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:33,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:34,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:34,045 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:34,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:34,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:46:34,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:34,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:34,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:34,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:46:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:46:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:46:34,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:34,572 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-26 21:46:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:34,880 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:46:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:46:34,880 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:46:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:34,881 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:46:34,881 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:46:34,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:46:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:46:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:46:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:46:34,885 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-26 21:46:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:34,885 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:46:34,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:46:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:46:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:46:34,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:34,886 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-26 21:46:34,887 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:34,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:34,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-26 21:46:34,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:34,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:34,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:35,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:35,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:35,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:35,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:35,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:35,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:46:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:46:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:46:35,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:35,629 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-26 21:46:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:35,955 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:46:35,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:46:35,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:46:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:35,956 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:46:35,956 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:46:35,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:46:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:46:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:46:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 21:46:35,959 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-26 21:46:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:35,960 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 21:46:35,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:46:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 21:46:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:46:35,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:35,961 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-26 21:46:35,961 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:35,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-26 21:46:35,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:35,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:35,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:35,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:35,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:36,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:36,893 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:36,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:36,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:36,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:36,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:37,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:37,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:46:37,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:46:37,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:46:37,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:37,345 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-26 21:46:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:37,790 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:46:37,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:46:37,790 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:46:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:37,791 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:46:37,792 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:46:37,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:46:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:46:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:46:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:46:37,795 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-26 21:46:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:37,796 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:46:37,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:46:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:46:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:46:37,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:37,797 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-26 21:46:37,797 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:37,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-26 21:46:37,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:37,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:37,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:37,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:37,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:38,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:38,563 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:38,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:38,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:46:38,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:38,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:39,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:39,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:46:39,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:46:39,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:46:39,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:39,456 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-26 21:46:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:39,846 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:46:39,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:46:39,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:46:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:39,847 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:46:39,847 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:46:39,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:46:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:46:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:46:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 21:46:39,850 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-26 21:46:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:39,851 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 21:46:39,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:46:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 21:46:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:46:39,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:39,852 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-26 21:46:39,852 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:39,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-26 21:46:39,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:39,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:39,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:39,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:39,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:41,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:41,233 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:41,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:41,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:41,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:41,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:41,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:41,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:46:41,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:46:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:46:41,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:41,591 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-26 21:46:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:41,988 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:46:41,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:46:41,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:46:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:41,989 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:46:41,989 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:46:41,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:46:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:46:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:46:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:46:41,993 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-26 21:46:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:41,993 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:46:41,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:46:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:46:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:46:41,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:41,994 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-26 21:46:41,994 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:41,994 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:41,994 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-26 21:46:41,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:41,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:41,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:43,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:43,559 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:43,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:44,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:46:44,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:44,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:45,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:45,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:46:45,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:46:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:46:45,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:45,177 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-26 21:46:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:45,460 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:46:45,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:46:45,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:46:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:45,461 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:46:45,461 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:46:45,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:46:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:46:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:46:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 21:46:45,464 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-26 21:46:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:45,465 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 21:46:45,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:46:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 21:46:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:46:45,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:45,465 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-26 21:46:45,465 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:45,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-26 21:46:45,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:45,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:45,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:45,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:45,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:46,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:46,036 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:46,043 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:46,452 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:46:46,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:46,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:46,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:46,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:46:46,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:46:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:46:46,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:46,945 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-26 21:46:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:47,436 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:46:47,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:46:47,437 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:46:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:47,437 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:46:47,438 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:46:47,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:46:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:46:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:46:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:46:47,441 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-26 21:46:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:47,441 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:46:47,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:46:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:46:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:46:47,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:47,442 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-26 21:46:47,442 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:47,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-26 21:46:47,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:47,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:47,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:47,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:48,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:48,018 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:48,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:48,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:48,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:48,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:46:48,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:46:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:46:48,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:48,370 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-26 21:46:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:49,305 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:46:49,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:46:49,305 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:46:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:49,306 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:46:49,306 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:46:49,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:46:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:46:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:46:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 21:46:49,309 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-26 21:46:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:49,310 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 21:46:49,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:46:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 21:46:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:46:49,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:49,311 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-26 21:46:49,311 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:49,311 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-26 21:46:49,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:49,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:49,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:49,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:49,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:49,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:49,794 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:49,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:49,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:49,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:49,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:50,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:50,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:46:50,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:46:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:46:50,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:50,911 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-26 21:46:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:51,359 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:46:51,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:46:51,359 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:46:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:51,360 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:46:51,360 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:46:51,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:46:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:46:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:46:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:46:51,363 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-26 21:46:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:51,364 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:46:51,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:46:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:46:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:46:51,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:51,365 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-26 21:46:51,365 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:51,365 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-26 21:46:51,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:51,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:51,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:51,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:51,817 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:51,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:52,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:46:52,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:52,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:54,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:54,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:46:54,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:46:54,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:46:54,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:54,001 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-26 21:46:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:54,433 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:46:54,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:46:54,433 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:46:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:54,434 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:46:54,434 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:46:54,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:46:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:46:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:46:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 21:46:54,436 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-26 21:46:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:54,436 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 21:46:54,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:46:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 21:46:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:46:54,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:54,437 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-26 21:46:54,437 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:54,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-26 21:46:54,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:54,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:54,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:54,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:54,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:54,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:54,850 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:54,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:54,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:54,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:54,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:55,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:55,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:46:55,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:46:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:46:55,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:55,367 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-26 21:46:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:55,877 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:46:55,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:46:55,877 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-26 21:46:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:55,878 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:46:55,878 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:46:55,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:46:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:46:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:46:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:46:55,882 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-26 21:46:55,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:55,882 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:46:55,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:46:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:46:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:46:55,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:55,883 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-26 21:46:55,883 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:55,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:55,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-26 21:46:55,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:55,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:55,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:55,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:55,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:56,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:56,406 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:56,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:58,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:46:58,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:58,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:58,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:58,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:46:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:46:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:46:58,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:58,853 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-26 21:46:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:59,504 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:46:59,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:46:59,505 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:46:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:59,505 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:46:59,505 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:46:59,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:46:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:46:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:46:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 21:46:59,509 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-26 21:46:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:59,509 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 21:46:59,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:46:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 21:46:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:46:59,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:59,510 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-26 21:46:59,510 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:59,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-26 21:46:59,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:59,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:59,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:59,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:59,984 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:59,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:00,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:47:00,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:00,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:00,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:00,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:47:00,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:47:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:47:00,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:00,834 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-26 21:47:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:01,365 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:47:01,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:47:01,365 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-26 21:47:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:01,366 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:47:01,366 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:47:01,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:47:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:47:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:47:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:47:01,369 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-26 21:47:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:01,369 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:47:01,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:47:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:47:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:47:01,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:01,370 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-26 21:47:01,370 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:01,370 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-26 21:47:01,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:01,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:01,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:01,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:01,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:01,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:01,795 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:01,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:01,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:02,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:02,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:47:02,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:47:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:47:02,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:02,181 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-26 21:47:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:02,640 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:47:02,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:47:02,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:47:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:02,641 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:47:02,641 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:47:02,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:47:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:47:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:47:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 21:47:02,644 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-26 21:47:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:02,644 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 21:47:02,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:47:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 21:47:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:47:02,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:02,645 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-26 21:47:02,645 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:02,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-26 21:47:02,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:02,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:02,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:03,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:03,104 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:03,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:03,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:03,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:03,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:03,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:03,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:47:03,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:47:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:47:03,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:03,588 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-26 21:47:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:03,999 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:47:03,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:47:04,000 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-26 21:47:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:04,000 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:47:04,000 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:47:04,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:47:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:47:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:47:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:47:04,004 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-26 21:47:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:04,004 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:47:04,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:47:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:47:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:47:04,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:04,006 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-26 21:47:04,006 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:04,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:04,006 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-26 21:47:04,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:04,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:04,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:04,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:04,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:04,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:04,513 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:05,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:47:05,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:05,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:05,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:05,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:47:05,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:47:05,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:47:05,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:05,625 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-26 21:47:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:06,100 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:47:06,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:47:06,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:47:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:06,101 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:47:06,101 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:47:06,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:47:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:47:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:47:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 21:47:06,103 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-26 21:47:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:06,104 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 21:47:06,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:47:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 21:47:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:47:06,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:06,105 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-26 21:47:06,105 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:06,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-26 21:47:06,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:06,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:06,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:06,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:06,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:06,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:06,564 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:06,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:06,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:06,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:06,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:06,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:06,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:47:06,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:47:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:47:06,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:06,984 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-26 21:47:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:07,530 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:47:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:47:07,530 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-26 21:47:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:07,531 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:47:07,531 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:47:07,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:47:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:47:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:47:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:47:07,534 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-26 21:47:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:07,535 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:47:07,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:47:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:47:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:47:07,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:07,536 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-26 21:47:07,536 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:07,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-26 21:47:07,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:07,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:07,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:07,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:07,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:07,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:07,986 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:07,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:10,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:47:10,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:10,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:11,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:11,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:47:11,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:47:11,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:47:11,195 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:11,195 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-26 21:47:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:11,772 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:47:11,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:47:11,772 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:47:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:11,773 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:47:11,773 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:47:11,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:47:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:47:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:47:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 21:47:11,776 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-26 21:47:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:11,776 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 21:47:11,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:47:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 21:47:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:47:11,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:11,777 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-26 21:47:11,777 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:11,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-26 21:47:11,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:11,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:11,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:11,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:11,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:12,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:12,273 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:12,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:12,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:47:12,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:12,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:13,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:13,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:47:13,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:47:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:47:13,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:13,413 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-26 21:47:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:13,921 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:47:13,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:47:13,921 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-26 21:47:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:13,922 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:47:13,922 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:47:13,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:47:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:47:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:47:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:47:13,925 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-26 21:47:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:13,925 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:47:13,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:47:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:47:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:47:13,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:13,926 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-26 21:47:13,926 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:13,926 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-26 21:47:13,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:13,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:13,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:13,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:14,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:14,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:14,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:14,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:14,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:14,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:47:14,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:47:14,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:47:14,992 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:14,992 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-26 21:47:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:15,629 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:47:15,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:47:15,630 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:47:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:15,630 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:47:15,630 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:47:15,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:47:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:47:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:47:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-26 21:47:15,634 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-26 21:47:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:15,634 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-26 21:47:15,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:47:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-26 21:47:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:47:15,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:15,636 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-26 21:47:15,636 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:15,636 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-26 21:47:15,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:15,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:15,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:15,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:16,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:16,166 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:16,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:16,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:16,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:16,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:16,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:16,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:47:16,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:47:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:47:16,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:16,600 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-26 21:47:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:17,254 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:47:17,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:47:17,255 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-26 21:47:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:17,256 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:47:17,256 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:47:17,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:47:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:47:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:47:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-26 21:47:17,259 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-26 21:47:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:17,259 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-26 21:47:17,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:47:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-26 21:47:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:47:17,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:17,260 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-26 21:47:17,260 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:17,261 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:17,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-26 21:47:17,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:17,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:17,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:17,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:17,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:17,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:17,751 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:17,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:18,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:47:18,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:18,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:19,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:19,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:47:19,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:47:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:47:19,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:19,437 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-26 21:47:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:20,185 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:47:20,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:47:20,186 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:47:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:20,186 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:47:20,187 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:47:20,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:47:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:47:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:47:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-26 21:47:20,189 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-26 21:47:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:20,189 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-26 21:47:20,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:47:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-26 21:47:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:47:20,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:20,190 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-26 21:47:20,191 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:20,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-26 21:47:20,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:20,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:20,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:20,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:20,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:20,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:20,685 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:20,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:20,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:20,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:20,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:21,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:21,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:47:21,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:47:21,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:47:21,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:21,138 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-26 21:47:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:21,807 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:47:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:47:21,807 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-26 21:47:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:21,808 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:47:21,808 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:47:21,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:47:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:47:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:47:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-26 21:47:21,811 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-26 21:47:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:21,811 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-26 21:47:21,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:47:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-26 21:47:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:47:21,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:21,812 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-26 21:47:21,812 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:21,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-26 21:47:21,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:21,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:21,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:21,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:21,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:22,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:22,465 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:22,473 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:26,663 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:47:26,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:26,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:27,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:27,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:47:27,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:47:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:47:27,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:27,087 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-26 21:47:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:27,765 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:47:27,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:47:27,766 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:47:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:27,767 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:47:27,767 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:47:27,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:47:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:47:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:47:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-26 21:47:27,770 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-26 21:47:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:27,771 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-26 21:47:27,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:47:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-26 21:47:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:47:27,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:27,772 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-26 21:47:27,772 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:27,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-26 21:47:27,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:27,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:27,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:28,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:28,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:28,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:29,256 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:47:29,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:29,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:29,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:29,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:47:29,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:47:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:47:29,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:29,728 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-26 21:47:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:30,326 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:47:30,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:47:30,326 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-26 21:47:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:30,327 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:47:30,327 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:47:30,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:47:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:47:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:47:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-26 21:47:30,334 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-26 21:47:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:30,334 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-26 21:47:30,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:47:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-26 21:47:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:47:30,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:30,335 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-26 21:47:30,336 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:30,336 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-26 21:47:30,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:30,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:30,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:30,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:30,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:30,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:30,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:30,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:30,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:31,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:31,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:47:31,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:47:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:47:31,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:31,405 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-26 21:47:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:32,163 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:47:32,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:47:32,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-26 21:47:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:32,164 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:47:32,164 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:47:32,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:47:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:47:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:47:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-26 21:47:32,168 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-26 21:47:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:32,169 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-26 21:47:32,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:47:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-26 21:47:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:47:32,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:32,170 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-26 21:47:32,170 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:32,170 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-26 21:47:32,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:32,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:32,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:32,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:32,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:32,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:32,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:32,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:33,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:33,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:47:33,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:47:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:47:33,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:33,312 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-26 21:47:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:33,905 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:47:33,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:47:33,905 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-26 21:47:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:33,906 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:47:33,906 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:47:33,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:47:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:47:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:47:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-26 21:47:33,909 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-26 21:47:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:33,909 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-26 21:47:33,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:47:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-26 21:47:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:47:33,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:33,910 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-26 21:47:33,910 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:33,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-26 21:47:33,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:33,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:33,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:33,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:33,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:34,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:34,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:34,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:35,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:47:35,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:35,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:36,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:36,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:47:36,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:47:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:47:36,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:36,298 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-26 21:47:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:36,838 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:47:36,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:47:36,839 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-26 21:47:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:36,839 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:47:36,840 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:47:36,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:47:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:47:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:47:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-26 21:47:36,842 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-26 21:47:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:36,843 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-26 21:47:36,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:47:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-26 21:47:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:47:36,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:36,843 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-26 21:47:36,844 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:36,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:36,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-26 21:47:36,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:36,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:36,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:36,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:36,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:37,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:37,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:37,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:37,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:37,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:37,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:37,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:37,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:47:37,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:47:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:47:37,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:37,933 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-26 21:47:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:38,791 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:47:38,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:47:38,792 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-26 21:47:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:38,792 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:47:38,793 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:47:38,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:47:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:47:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:47:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-26 21:47:38,796 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-26 21:47:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:38,796 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-26 21:47:38,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:47:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-26 21:47:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:47:38,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:38,797 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-26 21:47:38,797 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:38,797 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-26 21:47:38,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:38,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:38,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:38,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:38,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:39,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:39,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:39,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:44,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:47:44,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:44,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:45,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:45,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:47:45,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:47:45,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:47:45,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:45,474 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-26 21:47:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:46,446 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:47:46,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:47:46,447 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-26 21:47:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:46,448 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:47:46,448 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:47:46,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:47:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:47:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:47:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-26 21:47:46,452 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-26 21:47:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:46,452 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-26 21:47:46,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:47:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-26 21:47:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:47:46,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:46,453 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-26 21:47:46,453 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:46,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-26 21:47:46,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:46,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:46,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:46,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:46,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:47,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:47,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:47,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:48,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:47:48,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:48,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:48,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:48,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:47:48,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:47:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:47:48,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:48,882 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-26 21:47:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:49,473 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:47:49,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:47:49,473 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-26 21:47:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:49,474 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:47:49,474 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:47:49,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:47:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:47:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:47:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-26 21:47:49,478 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-26 21:47:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:49,478 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-26 21:47:49,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:47:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-26 21:47:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:47:49,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:49,479 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-26 21:47:49,479 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:49,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-26 21:47:49,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:49,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:49,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:49,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:49,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:50,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:50,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:50,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:50,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:50,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:50,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:47:50,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:47:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:47:50,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:50,813 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-26 21:47:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:51,530 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-26 21:47:51,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:47:51,531 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-26 21:47:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:51,532 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:47:51,532 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:47:51,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:47:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:47:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:47:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-26 21:47:51,535 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-26 21:47:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:51,535 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-26 21:47:51,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:47:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-26 21:47:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:47:51,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:51,536 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-26 21:47:51,536 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:51,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-26 21:47:51,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:51,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:51,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:51,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:51,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:52,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:52,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:52,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:52,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:52,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:52,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:52,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:52,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:47:52,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:47:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:47:52,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:52,741 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-26 21:47:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:53,566 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-26 21:47:53,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:47:53,566 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-26 21:47:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:53,567 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:47:53,567 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:47:53,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:47:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:47:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:47:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-26 21:47:53,570 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-26 21:47:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:53,570 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-26 21:47:53,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:47:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-26 21:47:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:47:53,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:53,571 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-26 21:47:53,571 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:53,571 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-26 21:47:53,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:53,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:53,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:53,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:53,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:54,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:54,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:54,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:56,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-26 21:47:56,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:56,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:56,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:56,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:47:56,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:47:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:47:56,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:56,679 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-26 21:47:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:57,477 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-26 21:47:57,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:47:57,478 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-26 21:47:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:57,478 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:47:57,479 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:47:57,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:57,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:47:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:47:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:47:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-26 21:47:57,481 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-26 21:47:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:57,482 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-26 21:47:57,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:47:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-26 21:47:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:47:57,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:57,482 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-26 21:47:57,483 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:57,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-26 21:47:57,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:57,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:57,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:57,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:57,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:58,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:58,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:47:58,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:58,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:58,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:58,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:58,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:58,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:47:58,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:47:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:47:58,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:58,886 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-26 21:47:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:59,571 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-26 21:47:59,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:47:59,571 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-26 21:47:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:59,572 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:47:59,572 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:47:59,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:47:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:47:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:47:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-26 21:47:59,575 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-26 21:47:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:59,575 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-26 21:47:59,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:47:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-26 21:47:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:47:59,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:59,576 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-26 21:47:59,576 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:59,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-26 21:47:59,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:59,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:59,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:59,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:59,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:00,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:00,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:00,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:07,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-26 21:48:07,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:07,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:07,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:07,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:48:07,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:48:07,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:48:07,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:07,898 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-26 21:48:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:08,551 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-26 21:48:08,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:48:08,552 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-26 21:48:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:08,552 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:48:08,553 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:48:08,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:48:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:48:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:48:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-26 21:48:08,556 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-26 21:48:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:08,556 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-26 21:48:08,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:48:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-26 21:48:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:48:08,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:08,558 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-26 21:48:08,558 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:08,558 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:08,558 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-26 21:48:08,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:08,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:08,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:08,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:08,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:09,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:09,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:09,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:10,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-26 21:48:10,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:10,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:11,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:11,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:48:11,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:48:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:48:11,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:11,501 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-26 21:48:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:12,451 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-26 21:48:12,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:48:12,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-26 21:48:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:12,452 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:48:12,453 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:48:12,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:48:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:48:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:48:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-26 21:48:12,456 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-26 21:48:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:12,457 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-26 21:48:12,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:48:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-26 21:48:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:48:12,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:12,458 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-26 21:48:12,458 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:12,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-26 21:48:12,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:12,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:12,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:13,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:13,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:13,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:13,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:13,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:13,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:48:13,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:48:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:48:13,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:13,841 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-26 21:48:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:14,509 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-26 21:48:14,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:48:14,509 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-26 21:48:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:14,510 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:48:14,510 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:48:14,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:48:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:48:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:48:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-26 21:48:14,514 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-26 21:48:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:14,514 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-26 21:48:14,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:48:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-26 21:48:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:48:14,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:14,515 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-26 21:48:14,515 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:14,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:14,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-26 21:48:14,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:14,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:14,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:14,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:15,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:15,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:15,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:15,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:15,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:15,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:15,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:15,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:48:15,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:48:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:48:15,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:15,891 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-26 21:48:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:16,815 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-26 21:48:16,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:48:16,815 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-26 21:48:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:16,816 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:48:16,816 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:48:16,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:48:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:48:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:48:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-26 21:48:16,819 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-26 21:48:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:16,819 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-26 21:48:16,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:48:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-26 21:48:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:48:16,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:16,820 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-26 21:48:16,820 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:16,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-26 21:48:16,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:16,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:16,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:17,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:17,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:17,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:20,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-26 21:48:20,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:20,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:20,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:20,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:48:20,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:48:20,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:48:20,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:20,562 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-26 21:48:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:21,297 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-26 21:48:21,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:48:21,298 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-26 21:48:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:21,299 INFO L225 Difference]: With dead ends: 183 [2018-09-26 21:48:21,299 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:48:21,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:48:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:48:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:48:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-26 21:48:21,302 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-26 21:48:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:21,302 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-26 21:48:21,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:48:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-26 21:48:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:48:21,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:21,303 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-26 21:48:21,303 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:21,303 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-26 21:48:21,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:21,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:21,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:21,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:21,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:22,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:22,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:22,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:22,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:22,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:22,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:22,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:22,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:48:22,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:48:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:48:22,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:22,673 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-26 21:48:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:23,556 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-26 21:48:23,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:48:23,556 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-26 21:48:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:23,557 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:48:23,557 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:48:23,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:48:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:48:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:48:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-26 21:48:23,560 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-26 21:48:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:23,560 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-26 21:48:23,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:48:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-26 21:48:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:48:23,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:23,561 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-26 21:48:23,561 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:23,561 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-26 21:48:23,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:23,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:23,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:23,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:23,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:24,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:24,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:24,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:34,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-26 21:48:34,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:34,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:34,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:34,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:48:34,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:48:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:48:34,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:34,996 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-26 21:48:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:35,771 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-26 21:48:35,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:48:35,772 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-26 21:48:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:35,773 INFO L225 Difference]: With dead ends: 187 [2018-09-26 21:48:35,773 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:48:35,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:48:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:48:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:48:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-26 21:48:35,776 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-26 21:48:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:35,776 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-26 21:48:35,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:48:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-26 21:48:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:48:35,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:35,777 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-26 21:48:35,777 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:35,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-26 21:48:35,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:35,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:35,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:35,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:35,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:36,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:36,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:36,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:38,797 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-26 21:48:38,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:38,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:39,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:39,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:48:39,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:48:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:48:39,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:39,373 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-26 21:48:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:40,157 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-26 21:48:40,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:48:40,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-26 21:48:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:40,158 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:48:40,158 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:48:40,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:48:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:48:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:48:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-26 21:48:40,162 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-26 21:48:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:40,163 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-26 21:48:40,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:48:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-26 21:48:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:48:40,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:40,164 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-26 21:48:40,164 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:40,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-26 21:48:40,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:40,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:40,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:40,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:40,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:40,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:40,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:41,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:41,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:41,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:48:41,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:48:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:48:41,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:41,630 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-26 21:48:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:42,549 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-26 21:48:42,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:48:42,549 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-26 21:48:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:42,550 INFO L225 Difference]: With dead ends: 191 [2018-09-26 21:48:42,550 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:48:42,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:48:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:48:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:48:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-26 21:48:42,554 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-26 21:48:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:42,554 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-26 21:48:42,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:48:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-26 21:48:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:48:42,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:42,555 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-26 21:48:42,556 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:42,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-26 21:48:42,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:42,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:42,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:42,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:42,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:43,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:43,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:43,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:43,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:43,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:43,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:44,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:44,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:48:44,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:48:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:48:44,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:44,039 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-26 21:48:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:44,839 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-26 21:48:44,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:48:44,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-26 21:48:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:44,840 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:48:44,840 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:48:44,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:48:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:48:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:48:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-26 21:48:44,844 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-26 21:48:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:44,844 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-26 21:48:44,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:48:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-26 21:48:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:48:44,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:44,845 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-26 21:48:44,845 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:44,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-26 21:48:44,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:44,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:44,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:44,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:45,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:45,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:45,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:48,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-26 21:48:48,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:48,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:49,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:49,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:48:49,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:48:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:48:49,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:49,547 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-26 21:48:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:50,587 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-26 21:48:50,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:48:50,587 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-26 21:48:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:50,588 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:48:50,588 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:48:50,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:48:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:48:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:48:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-26 21:48:50,591 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-26 21:48:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:50,591 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-26 21:48:50,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:48:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-26 21:48:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:48:50,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:50,592 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-26 21:48:50,593 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:50,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-26 21:48:50,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:50,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:50,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:50,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:51,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:51,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:51,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:51,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:51,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:51,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:52,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:52,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:48:52,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:48:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:48:52,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:52,116 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-26 21:48:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:53,049 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-26 21:48:53,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:48:53,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-26 21:48:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:53,050 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:48:53,050 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:48:53,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:48:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:48:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:48:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-26 21:48:53,053 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-26 21:48:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:53,053 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-26 21:48:53,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:48:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-26 21:48:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:48:53,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:53,054 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-26 21:48:53,054 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:53,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:53,055 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-26 21:48:53,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:53,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:53,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:53,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:53,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:53,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:53,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:06,316 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-26 21:49:06,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:06,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:06,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:06,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:49:06,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:49:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:49:06,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:06,909 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-26 21:49:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:07,816 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-26 21:49:07,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:49:07,816 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-26 21:49:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:07,817 INFO L225 Difference]: With dead ends: 199 [2018-09-26 21:49:07,817 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:49:07,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:49:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:49:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:49:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-26 21:49:07,821 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-26 21:49:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:07,822 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-26 21:49:07,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:49:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-26 21:49:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:49:07,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:07,823 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-26 21:49:07,823 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:07,823 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-26 21:49:07,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:07,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:08,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:08,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:08,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:11,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-26 21:49:11,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:11,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:12,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:12,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:49:12,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:49:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:49:12,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:12,362 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-26 21:49:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:13,413 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-26 21:49:13,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:49:13,414 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-26 21:49:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:13,415 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:49:13,415 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:49:13,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:49:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:49:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:49:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-26 21:49:13,419 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-26 21:49:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:13,419 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-26 21:49:13,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:49:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-26 21:49:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:49:13,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:13,420 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-26 21:49:13,420 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:13,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-26 21:49:13,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:13,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:13,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:13,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:13,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:14,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:14,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:14,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:14,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:15,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:15,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:49:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:49:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:49:15,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:15,066 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-26 21:49:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:16,021 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-26 21:49:16,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:49:16,021 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-26 21:49:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:16,022 INFO L225 Difference]: With dead ends: 203 [2018-09-26 21:49:16,022 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:49:16,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:49:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:49:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:49:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-26 21:49:16,025 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-26 21:49:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:16,026 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-26 21:49:16,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:49:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-26 21:49:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:49:16,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:16,026 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-26 21:49:16,027 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:16,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-26 21:49:16,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:16,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:16,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:16,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:16,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:16,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:16,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:16,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:17,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:17,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:17,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:17,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:17,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:49:17,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:49:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:49:17,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:17,745 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-26 21:49:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:18,798 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-26 21:49:18,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:49:18,799 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-26 21:49:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:18,800 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:49:18,800 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:49:18,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:49:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:49:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:49:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-26 21:49:18,803 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-26 21:49:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:18,803 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-26 21:49:18,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:49:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-26 21:49:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:49:18,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:18,804 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-26 21:49:18,804 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:18,804 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-26 21:49:18,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:18,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:18,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:19,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:19,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:19,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:24,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-26 21:49:24,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:24,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:24,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:24,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:49:24,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:49:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:49:24,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:24,683 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-26 21:49:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:25,672 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-26 21:49:25,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:49:25,672 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-26 21:49:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:25,673 INFO L225 Difference]: With dead ends: 207 [2018-09-26 21:49:25,673 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:49:25,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:49:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:49:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:49:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-26 21:49:25,676 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-26 21:49:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:25,676 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-26 21:49:25,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:49:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-26 21:49:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:49:25,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:25,677 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-26 21:49:25,678 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:25,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-26 21:49:25,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:25,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:25,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:25,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:25,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:26,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:26,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:26,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:26,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:26,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:26,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:27,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:27,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:49:27,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:49:27,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:49:27,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:27,365 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-26 21:49:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:28,366 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-26 21:49:28,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:49:28,366 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-26 21:49:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:28,367 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:49:28,367 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:49:28,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:49:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:49:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:49:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-26 21:49:28,371 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-26 21:49:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:28,372 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-26 21:49:28,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:49:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-26 21:49:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:49:28,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:28,373 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-26 21:49:28,373 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:28,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-26 21:49:28,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:28,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:28,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:28,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:29,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:29,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:29,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:45,916 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-26 21:49:45,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:45,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:46,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:46,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:49:46,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:49:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:49:46,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:46,665 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-26 21:49:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:47,894 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-26 21:49:47,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:49:47,894 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-26 21:49:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:47,895 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:49:47,895 INFO L226 Difference]: Without dead ends: 209 [2018-09-26 21:49:47,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-26 21:49:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-26 21:49:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:49:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-26 21:49:47,898 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-26 21:49:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:47,898 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-26 21:49:47,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:49:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-26 21:49:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:49:47,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:47,899 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-26 21:49:47,899 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:47,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-26 21:49:47,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:47,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:49,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:49,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:49,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:52,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-26 21:49:52,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:52,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:53,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:53,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:49:53,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:49:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:49:53,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:53,151 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-26 21:49:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:54,327 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-26 21:49:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:49:54,327 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-26 21:49:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:54,327 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:49:54,328 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:49:54,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:49:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:49:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:49:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-26 21:49:54,331 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-26 21:49:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:54,332 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-26 21:49:54,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:49:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-26 21:49:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:49:54,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:54,333 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-26 21:49:54,333 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:54,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-26 21:49:54,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:54,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:54,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:54,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:55,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:55,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:55,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:55,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:56,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:56,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:49:56,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:49:56,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:49:56,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:56,061 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-26 21:49:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:57,113 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-26 21:49:57,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:49:57,114 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-26 21:49:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:57,114 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:49:57,114 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:49:57,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:49:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-26 21:49:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-26 21:49:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-26 21:49:57,118 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-26 21:49:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:57,118 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-26 21:49:57,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:49:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-26 21:49:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-26 21:49:57,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:57,119 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-26 21:49:57,120 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:57,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-26 21:49:57,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:57,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:57,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:58,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:58,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:58,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:58,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:58,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:58,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:59,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:59,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:49:59,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:49:59,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:49:59,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:59,178 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. Received shutdown request... [2018-09-26 21:49:59,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:49:59,659 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:49:59,664 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:49:59,665 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:49:59 BoogieIcfgContainer [2018-09-26 21:49:59,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:49:59,665 INFO L168 Benchmark]: Toolchain (without parser) took 251297.55 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 113.7 MB). Peak memory consumption was 344.9 MB. Max. memory is 7.1 GB. [2018-09-26 21:49:59,667 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. [2018-09-26 21:49:59,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.02 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. [2018-09-26 21:49:59,668 INFO L168 Benchmark]: Boogie Preprocessor took 20.25 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. [2018-09-26 21:49:59,668 INFO L168 Benchmark]: RCFGBuilder took 265.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:49:59,669 INFO L168 Benchmark]: TraceAbstraction took 250965.80 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 92.5 MB). Peak memory consumption was 323.7 MB. Max. memory is 7.1 GB. [2018-09-26 21:49:59,671 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 40.02 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 20.25 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 265.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250965.80 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 231.2 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 92.5 MB). Peak memory consumption was 323.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was constructing difference of abstraction (213states) and FLOYD_HOARE automaton (currently 70 states, 107 states before enhancement), while ReachableStatesComputation was computing reachable states (135 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 250.9s OverallTime, 105 OverallIterations, 105 TraceHistogramMax, 52.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 418 SDtfs, 0 SDslu, 8514 SDs, 0 SdLazy, 8620 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16902 GetRequests, 11337 SyntacticMatches, 0 SemanticMatches, 5565 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 104 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 98.5s SatisfiabilityAnalysisTime, 91.7s InterpolantComputationTime, 22676 NumberOfCodeBlocks, 22676 NumberOfCodeBlocksAsserted, 2930 NumberOfCheckSat, 22467 ConstructedInterpolants, 0 QuantifiedInterpolants, 9482949 SizeOfPredicates, 104 NumberOfNonLiveVariables, 28652 ConjunctsInSsa, 5668 ConjunctsInUnsatCore, 209 InterpolantComputations, 1 PerfectInterpolantSequences, 0/771680 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-49-59-681.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-49-59-681.csv Completed graceful shutdown