java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:33:09,087 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:33:09,090 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:33:09,107 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:33:09,108 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:33:09,109 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:33:09,110 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:33:09,112 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:33:09,115 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:33:09,116 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:33:09,117 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:33:09,117 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:33:09,118 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:33:09,119 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:33:09,120 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:33:09,121 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:33:09,122 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:33:09,123 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:33:09,125 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:33:09,127 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:33:09,128 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:33:09,129 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:33:09,132 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:33:09,140 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:33:09,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:33:09,156 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:33:09,157 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:33:09,157 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:33:09,157 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:33:09,158 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:33:09,158 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:33:09,158 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:33:09,158 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:33:09,159 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:33:09,159 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:33:09,159 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:33:09,159 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:33:09,159 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:33:09,160 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:33:09,160 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:33:09,160 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:33:09,160 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:33:09,160 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:33:09,161 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:33:09,161 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:33:09,161 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:33:09,161 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:33:09,162 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:33:09,162 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:33:09,162 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:33:09,162 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:33:09,162 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:33:09,162 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:33:09,163 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:33:09,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:33:09,229 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:33:09,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:33:09,237 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:33:09,238 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:33:09,239 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-23 21:33:09,240 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-23 21:33:09,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:33:09,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:33:09,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:33:09,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:33:09,294 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:33:09,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,336 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:33:09,336 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:33:09,336 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:33:09,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:33:09,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:33:09,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:33:09,340 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:33:09,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... [2018-09-23 21:33:09,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:33:09,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:33:09,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:33:09,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:33:09,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:33:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-23 21:33:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-23 21:33:09,593 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:33:09,593 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:33:09 BoogieIcfgContainer [2018-09-23 21:33:09,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:33:09,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:33:09,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:33:09,598 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:33:09,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:33:09" (1/2) ... [2018-09-23 21:33:09,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218727d9 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:33:09, skipping insertion in model container [2018-09-23 21:33:09,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:33:09" (2/2) ... [2018-09-23 21:33:09,601 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-23 21:33:09,611 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:33:09,618 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:33:09,671 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:33:09,672 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:33:09,673 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:33:09,673 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:33:09,673 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:33:09,673 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:33:09,673 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:33:09,674 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:33:09,674 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:33:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 21:33:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-23 21:33:09,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:09,701 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-23 21:33:09,702 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:09,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-23 21:33:09,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:09,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:09,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:09,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:09,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:09,895 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:33:09,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:33:09,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:33:09,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:33:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:33:09,915 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 21:33:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:09,952 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:33:09,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:33:09,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-23 21:33:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:09,981 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:33:09,981 INFO L226 Difference]: Without dead ends: 4 [2018-09-23 21:33:09,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:33:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-23 21:33:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-23 21:33:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-23 21:33:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-23 21:33:10,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-23 21:33:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:10,040 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-23 21:33:10,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:33:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-23 21:33:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:33:10,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:10,041 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:33:10,042 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:10,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-23 21:33:10,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:10,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:10,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:10,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:10,191 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 [2018-09-23 21:33:10,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:10,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:10,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-23 21:33:10,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:33:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:33:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:33:10,277 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-23 21:33:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:10,384 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-23 21:33:10,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:33:10,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-23 21:33:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:10,385 INFO L225 Difference]: With dead ends: 6 [2018-09-23 21:33:10,386 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:33:10,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:33:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:33:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:33:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:33:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:33:10,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:33:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:10,390 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:33:10,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:33:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:33:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:33:10,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:10,391 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-23 21:33:10,391 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:10,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-23 21:33:10,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:10,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:10,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:10,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:10,634 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 [2018-09-23 21:33:10,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:10,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:10,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:10,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:10,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:33:10,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:33:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:33:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:33:10,729 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-23 21:33:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:10,765 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-23 21:33:10,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:33:10,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 21:33:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:10,766 INFO L225 Difference]: With dead ends: 7 [2018-09-23 21:33:10,766 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:33:10,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:33:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:33:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:33:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:33:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:33:10,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:33:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:10,770 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:33:10,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:33:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:33:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:33:10,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:10,771 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-23 21:33:10,771 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:10,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-23 21:33:10,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:10,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:10,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:10,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:10,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:10,955 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 [2018-09-23 21:33:10,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:11,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:33:11,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:11,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:11,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:33:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:33:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:33:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:33:11,108 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 21:33:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:11,235 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:33:11,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:33:11,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 21:33:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:11,237 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:33:11,237 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:33:11,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:33:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:33:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:33:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:33:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:33:11,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:33:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:11,241 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:33:11,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:33:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:33:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:33:11,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:11,242 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-23 21:33:11,243 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:11,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:11,243 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-23 21:33:11,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:11,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:11,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:11,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:11,414 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 [2018-09-23 21:33:11,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:11,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:11,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:11,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:11,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:33:11,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:33:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:33:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:33:11,478 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-23 21:33:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:11,628 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:33:11,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:33:11,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-23 21:33:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:11,630 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:33:11,630 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:33:11,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:33:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:33:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:33:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:33:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:33:11,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:33:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:11,635 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:33:11,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:33:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:33:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:33:11,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:11,636 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-23 21:33:11,637 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:11,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-23 21:33:11,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:11,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:11,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:11,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:11,786 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 [2018-09-23 21:33:11,796 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:11,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:33:11,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:11,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:11,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:11,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:33:11,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:33:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:33:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:33:11,833 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 21:33:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:11,931 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:33:11,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:33:11,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 21:33:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:11,933 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:33:11,933 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:33:11,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:33:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:33:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:33:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:33:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:33:11,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:33:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:11,938 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:33:11,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:33:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:33:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:33:11,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:11,939 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-23 21:33:11,939 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:11,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-23 21:33:11,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:11,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:11,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:11,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:12,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:12,411 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 [2018-09-23 21:33:12,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:12,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:33:12,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:12,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:12,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:12,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:33:12,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:33:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:33:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:33:12,458 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-23 21:33:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:12,574 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:33:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:33:12,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-23 21:33:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:12,575 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:33:12,576 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:33:12,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:33:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:33:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:33:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:33:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:33:12,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:33:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:12,581 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:33:12,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:33:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:33:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:33:12,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:12,582 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-23 21:33:12,582 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:12,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:12,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-23 21:33:12,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:12,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:12,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:12,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:12,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:12,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:12,731 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 [2018-09-23 21:33:12,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:12,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:12,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:12,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:33:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:33:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:33:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:33:12,781 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 21:33:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:12,883 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:33:12,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:33:12,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 21:33:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:12,885 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:33:12,885 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:33:12,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:33:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:33:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:33:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:33:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:33:12,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:33:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:12,890 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:33:12,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:33:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:33:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:33:12,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:12,891 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-23 21:33:12,891 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:12,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:12,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-23 21:33:12,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:12,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:12,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:12,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:12,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:13,129 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 [2018-09-23 21:33:13,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:13,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:13,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:13,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:13,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:33:13,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:33:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:33:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:33:13,180 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-23 21:33:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:13,290 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:33:13,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:33:13,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-23 21:33:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:13,291 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:33:13,291 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:33:13,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:33:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:33:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:33:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:33:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:33:13,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:33:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:13,296 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:33:13,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:33:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:33:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:33:13,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:13,297 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-23 21:33:13,297 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:13,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-23 21:33:13,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:13,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:13,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:13,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:13,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:13,489 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 [2018-09-23 21:33:13,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:13,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:33:13,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:13,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:13,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:33:13,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:33:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:33:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:33:13,577 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 21:33:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:13,700 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:33:13,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:33:13,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 21:33:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:13,701 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:33:13,702 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:33:13,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:33:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:33:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:33:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:33:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:33:13,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:33:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:13,705 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:33:13,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:33:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:33:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:33:13,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:13,706 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-23 21:33:13,706 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:13,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-23 21:33:13,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:13,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:13,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:13,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:13,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:13,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:13,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:13,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:13,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:13,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:13,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:13,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:33:13,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:33:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:33:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:33:13,950 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-23 21:33:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:14,084 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:33:14,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:33:14,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 21:33:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:14,086 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:33:14,086 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:33:14,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:33:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:33:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:33:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:33:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:33:14,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:33:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:14,091 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:33:14,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:33:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:33:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:33:14,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:14,092 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-23 21:33:14,093 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:14,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-23 21:33:14,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:14,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:14,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:14,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:14,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:14,422 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 [2018-09-23 21:33:14,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:14,449 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:33:14,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:14,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:14,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:14,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:33:14,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:33:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:33:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:33:14,501 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 21:33:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:14,719 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:33:14,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:33:14,720 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 21:33:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:14,721 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:33:14,721 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:33:14,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:33:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:33:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:33:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:33:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:33:14,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:33:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:14,725 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:33:14,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:33:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:33:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:33:14,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:14,726 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-23 21:33:14,727 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:14,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-23 21:33:14,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:14,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:14,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:14,995 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 [2018-09-23 21:33:15,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:15,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:33:15,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:15,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:15,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:15,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:33:15,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:33:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:33:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:33:15,063 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-23 21:33:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:15,263 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:33:15,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:33:15,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 21:33:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:15,265 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:33:15,265 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:33:15,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:33:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:33:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:33:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:33:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:33:15,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:33:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:15,271 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:33:15,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:33:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:33:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:33:15,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:15,272 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-23 21:33:15,272 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:15,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-23 21:33:15,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:15,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:15,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:15,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:15,526 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 [2018-09-23 21:33:15,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:15,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:15,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:15,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:33:15,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:33:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:33:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:33:15,572 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 21:33:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:15,919 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:33:15,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:33:15,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 21:33:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:15,920 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:33:15,921 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:33:15,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:33:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:33:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:33:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:33:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:33:15,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:33:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:15,925 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:33:15,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:33:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:33:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:33:15,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:15,926 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-23 21:33:15,927 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:15,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-23 21:33:15,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:15,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:15,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:15,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:15,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:16,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:16,220 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 [2018-09-23 21:33:16,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:16,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:16,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:16,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:16,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:16,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:33:16,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:33:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:33:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:33:16,291 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-23 21:33:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:16,707 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:33:16,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:33:16,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-23 21:33:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:16,707 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:33:16,708 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:33:16,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:33:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:33:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:33:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:33:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:33:16,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:33:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:16,713 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:33:16,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:33:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:33:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:33:16,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:16,714 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-23 21:33:16,715 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:16,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-23 21:33:16,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:16,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:16,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:17,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:17,025 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 [2018-09-23 21:33:17,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:17,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:33:17,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:17,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:17,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:17,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:33:17,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:33:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:33:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:33:17,105 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 21:33:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:17,333 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:33:17,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:33:17,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 21:33:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:17,334 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:33:17,334 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:33:17,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:33:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:33:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:33:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:33:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:33:17,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:33:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:17,340 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:33:17,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:33:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:33:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:33:17,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:17,340 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-23 21:33:17,341 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:17,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-23 21:33:17,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:17,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:17,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:17,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:17,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:17,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:17,652 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 [2018-09-23 21:33:17,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:17,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:17,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:17,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:17,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:17,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:33:17,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:33:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:33:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:33:17,706 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-23 21:33:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:17,994 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:33:17,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:33:17,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-23 21:33:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:17,996 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:33:17,996 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:33:17,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:33:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:33:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:33:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:33:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:33:18,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:33:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:18,001 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:33:18,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:33:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:33:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:33:18,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:18,002 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-23 21:33:18,003 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:18,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:18,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-23 21:33:18,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:18,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:18,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:18,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:18,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:18,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:18,473 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 [2018-09-23 21:33:18,483 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:18,492 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:33:18,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:18,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:18,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:18,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:33:18,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:33:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:33:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:33:18,534 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 21:33:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:18,819 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:33:18,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:33:18,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 21:33:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:18,820 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:33:18,820 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:33:18,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:33:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:33:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:33:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:33:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:33:18,826 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:33:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:18,826 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:33:18,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:33:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:33:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:33:18,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:18,827 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-23 21:33:18,827 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:18,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-23 21:33:18,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:18,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:18,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:18,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:18,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:19,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:19,244 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 [2018-09-23 21:33:19,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:19,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:33:19,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:19,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:19,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:19,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:33:19,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:33:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:33:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:33:19,332 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-23 21:33:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:19,641 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:33:19,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:33:19,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-23 21:33:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:19,643 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:33:19,643 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:33:19,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:33:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:33:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:33:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:33:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:33:19,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:33:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:19,649 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:33:19,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:33:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:33:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:33:19,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:19,650 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-23 21:33:19,650 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:19,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-23 21:33:19,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:19,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:19,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:19,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:19,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:19,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:19,974 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 [2018-09-23 21:33:19,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:19,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:20,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:20,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:33:20,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:33:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:33:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:33:20,042 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 21:33:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:20,398 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:33:20,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:33:20,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 21:33:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:20,400 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:33:20,400 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:33:20,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:33:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:33:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:33:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:33:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:33:20,405 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:33:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:33:20,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:33:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:33:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:33:20,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:20,407 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-23 21:33:20,407 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:20,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-23 21:33:20,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:20,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:20,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:20,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:21,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:21,074 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 [2018-09-23 21:33:21,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:21,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:21,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:21,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:21,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:21,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:33:21,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:33:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:33:21,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:33:21,134 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-23 21:33:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:21,505 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:33:21,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:33:21,505 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-23 21:33:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:21,506 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:33:21,506 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:33:21,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:33:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:33:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:33:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:33:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:33:21,511 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:33:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:33:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:33:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:33:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:33:21,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:21,512 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-23 21:33:21,512 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:21,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-23 21:33:21,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:21,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:21,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:21,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:21,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:22,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:22,048 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 [2018-09-23 21:33:22,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:22,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:33:22,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:22,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:22,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:22,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:33:22,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:33:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:33:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:33:22,110 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 21:33:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:22,509 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:33:22,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:33:22,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 21:33:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:22,513 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:33:22,513 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:33:22,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:33:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:33:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:33:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:33:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:33:22,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:33:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:22,519 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:33:22,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:33:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:33:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:33:22,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:22,520 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-23 21:33:22,520 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:22,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-23 21:33:22,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:22,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:22,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:22,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:22,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:23,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:23,102 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 [2018-09-23 21:33:23,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:23,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:23,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:23,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:23,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:23,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:33:23,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:33:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:33:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:33:23,161 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-23 21:33:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:23,543 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:33:23,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:33:23,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-23 21:33:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:23,544 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:33:23,544 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:33:23,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:33:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:33:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:33:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:33:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:33:23,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:33:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:23,550 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:33:23,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:33:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:33:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:33:23,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:23,550 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-23 21:33:23,551 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:23,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:23,551 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-23 21:33:23,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:23,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:23,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:23,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:23,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:23,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:23,961 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 [2018-09-23 21:33:23,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:23,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:33:23,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:23,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:24,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:24,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:33:24,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:33:24,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:33:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:24,022 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 21:33:24,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:24,931 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:33:24,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:33:24,931 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 21:33:24,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:24,932 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:33:24,932 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:33:24,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:33:24,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:33:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:33:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:33:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:33:24,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:33:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:24,937 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:33:24,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:33:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:33:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:33:24,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:24,938 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-23 21:33:24,938 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:24,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-23 21:33:24,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:24,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:24,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:24,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:25,452 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 [2018-09-23 21:33:25,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:25,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:33:25,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:25,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:25,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:25,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:33:25,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:33:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:33:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:33:25,505 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-23 21:33:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:25,989 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:33:25,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:33:25,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-23 21:33:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:25,990 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:33:25,990 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:33:25,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:33:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:33:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:33:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:33:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:33:25,996 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:33:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:25,997 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:33:25,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:33:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:33:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:33:25,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:25,998 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-23 21:33:25,998 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:25,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-23 21:33:25,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:25,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:25,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:25,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:25,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:26,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:26,502 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 [2018-09-23 21:33:26,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:26,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:26,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:26,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:33:26,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:33:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:33:26,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:33:26,567 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 21:33:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:27,146 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:33:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:33:27,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 21:33:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:27,147 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:33:27,147 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:33:27,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:33:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:33:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:33:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:33:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:33:27,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:33:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:27,153 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:33:27,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:33:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:33:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:33:27,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:27,154 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-23 21:33:27,154 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:27,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-23 21:33:27,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:27,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:27,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:27,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:27,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:27,606 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 [2018-09-23 21:33:27,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:27,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:27,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:27,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:27,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:27,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:33:27,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:33:27,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:33:27,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:33:27,676 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-23 21:33:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:28,175 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:33:28,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:33:28,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-23 21:33:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:28,177 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:33:28,177 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:33:28,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:33:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:33:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:33:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:33:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:33:28,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:33:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:28,182 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:33:28,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:33:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:33:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:33:28,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:28,182 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-23 21:33:28,183 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:28,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-23 21:33:28,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:28,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:28,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:28,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:28,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:28,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:28,673 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 [2018-09-23 21:33:28,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:28,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:33:28,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:28,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:28,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:28,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:33:28,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:33:28,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:33:28,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:33:28,730 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 21:33:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:29,411 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:33:29,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:33:29,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 21:33:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:29,412 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:33:29,412 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:33:29,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:33:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:33:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:33:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:33:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:33:29,418 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:33:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:29,418 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:33:29,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:33:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:33:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:33:29,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:29,419 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-23 21:33:29,419 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:29,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-23 21:33:29,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:29,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:29,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:29,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:29,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:29,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:29,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:30,000 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:30,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:30,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:30,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:30,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:33:30,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:33:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:33:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:33:30,036 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-23 21:33:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:30,603 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:33:30,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:33:30,603 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-23 21:33:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:30,604 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:33:30,604 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:33:30,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:33:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:33:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:33:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:33:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:33:30,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:33:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:30,611 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:33:30,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:33:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:33:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:33:30,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:30,611 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-23 21:33:30,612 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:30,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-23 21:33:30,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:30,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:30,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:30,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:30,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:31,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:31,183 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 [2018-09-23 21:33:31,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:31,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:33:31,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:31,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:31,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:31,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:33:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:33:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:33:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:33:31,255 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 21:33:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:31,977 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:33:31,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:33:31,977 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 21:33:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:31,978 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:33:31,978 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:33:31,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:33:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:33:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:33:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:33:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:33:31,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:33:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:31,984 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:33:31,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:33:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:33:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:33:31,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:31,985 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-23 21:33:31,985 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:31,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-23 21:33:31,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:31,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:31,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:31,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:31,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:32,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:32,671 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 [2018-09-23 21:33:32,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:32,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:33:32,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:32,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:32,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:32,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:33:32,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:33:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:33:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:33:32,795 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-23 21:33:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:33,428 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:33:33,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:33:33,429 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-23 21:33:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:33,430 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:33:33,430 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:33:33,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:33:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:33:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:33:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:33:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:33:33,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:33:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:33,436 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:33:33,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:33:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:33:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:33:33,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:33,436 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-23 21:33:33,437 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:33,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-23 21:33:33,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:33,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:33,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:33,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:33,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:34,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:34,136 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 [2018-09-23 21:33:34,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:34,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:34,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:34,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:33:34,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:33:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:33:34,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:33:34,201 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 21:33:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:34,935 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:33:34,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:33:34,936 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 21:33:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:34,936 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:33:34,937 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:33:34,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:33:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:33:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:33:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:33:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:33:34,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:33:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:34,942 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:33:34,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:33:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:33:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:33:34,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:34,942 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-23 21:33:34,943 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:34,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-23 21:33:34,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:34,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:35,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:35,683 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 [2018-09-23 21:33:35,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:35,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:35,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:35,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:35,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:35,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:33:35,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:33:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:33:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:33:35,775 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-23 21:33:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:36,671 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:33:36,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:33:36,671 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-23 21:33:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:36,672 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:33:36,672 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:33:36,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:33:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:33:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:33:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:33:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:33:36,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:33:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:36,679 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:33:36,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:33:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:33:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:33:36,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:36,679 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-23 21:33:36,680 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:36,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:36,680 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-23 21:33:36,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:36,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:36,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:38,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:38,538 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 [2018-09-23 21:33:38,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:38,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:33:38,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:38,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:38,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:38,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:33:38,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:33:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:33:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:33:38,609 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 21:33:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:39,357 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:33:39,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:33:39,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 21:33:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:39,358 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:33:39,358 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:33:39,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:33:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:33:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:33:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:33:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:33:39,363 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:33:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:39,363 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:33:39,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:33:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:33:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:33:39,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:39,364 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-23 21:33:39,364 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:39,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-23 21:33:39,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:39,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:39,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:39,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:39,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:40,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:40,494 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 [2018-09-23 21:33:40,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:40,512 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:40,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:40,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:40,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:40,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:33:40,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:33:40,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:33:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:33:40,566 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-23 21:33:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:41,376 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:33:41,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:33:41,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-23 21:33:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:41,377 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:33:41,377 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:33:41,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:33:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:33:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:33:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:33:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:33:41,381 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:33:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:41,381 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:33:41,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:33:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:33:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:33:41,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:41,382 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-23 21:33:41,382 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:41,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-23 21:33:41,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:41,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:41,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:41,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:41,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:42,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:42,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:33:42,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:42,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:33:42,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:42,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:42,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:42,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:33:42,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:33:42,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:33:42,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:33:42,547 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 21:33:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:43,384 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:33:43,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:33:43,384 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 21:33:43,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:43,385 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:33:43,385 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:33:43,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:33:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:33:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:33:43,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:33:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:33:43,389 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:33:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:43,389 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:33:43,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:33:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:33:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:33:43,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:43,390 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-23 21:33:43,390 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:43,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-23 21:33:43,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:43,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:43,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:43,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:43,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:44,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:44,535 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 [2018-09-23 21:33:44,543 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:44,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:33:44,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:44,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:44,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:44,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:33:44,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:33:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:33:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:33:44,594 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-23 21:33:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:45,532 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:33:45,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:33:45,533 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-23 21:33:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:45,534 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:33:45,534 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:33:45,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:33:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:33:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:33:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:33:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:33:45,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:33:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:45,539 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:33:45,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:33:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:33:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:33:45,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:45,540 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-23 21:33:45,540 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:45,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-23 21:33:45,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:45,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:45,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:45,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:45,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:46,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:46,833 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 [2018-09-23 21:33:46,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:46,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:46,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:46,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:33:46,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:33:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:33:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:33:46,882 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 21:33:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:47,927 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:33:47,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:33:47,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 21:33:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:47,928 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:33:47,928 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:33:47,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:33:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:33:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:33:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:33:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:33:47,932 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:33:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:47,932 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:33:47,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:33:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:33:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:33:47,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:47,933 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-23 21:33:47,933 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:47,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-23 21:33:47,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:47,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:47,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:47,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:33:47,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:49,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:49,420 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 [2018-09-23 21:33:49,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:33:49,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:33:49,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:49,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:49,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:49,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:33:49,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:33:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:33:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:33:49,476 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-23 21:33:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:50,457 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:33:50,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:33:50,458 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-23 21:33:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:50,459 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:33:50,459 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:33:50,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:33:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:33:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:33:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:33:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:33:50,463 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:33:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:50,464 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:33:50,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:33:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:33:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:33:50,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:50,465 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-23 21:33:50,465 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:50,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-23 21:33:50,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:50,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:50,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:50,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:50,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:51,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:51,432 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 [2018-09-23 21:33:51,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:33:51,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:33:51,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:51,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:51,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:51,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:33:51,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:33:51,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:33:51,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:33:51,505 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 21:33:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:52,698 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:33:52,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:33:52,699 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 21:33:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:52,699 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:33:52,700 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:33:52,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:33:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:33:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:33:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:33:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:33:52,704 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:33:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:52,704 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:33:52,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:33:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:33:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:33:52,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:52,705 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-23 21:33:52,705 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:52,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-23 21:33:52,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:52,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:52,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:52,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:52,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:53,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:53,605 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 [2018-09-23 21:33:53,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:33:53,625 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:33:53,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:53,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:53,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:53,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:33:53,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:33:53,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:33:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:33:53,657 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-23 21:33:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:54,743 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:33:54,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:33:54,744 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-23 21:33:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:54,745 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:33:54,745 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:33:54,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:33:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:33:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:33:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:33:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:33:54,749 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:33:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:54,749 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:33:54,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:33:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:33:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:33:54,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:54,750 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-23 21:33:54,750 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:54,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-23 21:33:54,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:54,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:54,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:54,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:54,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:56,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:56,919 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 [2018-09-23 21:33:56,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:33:56,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:33:56,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:56,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:56,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:56,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:33:56,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:33:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:33:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:33:56,983 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 21:33:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:33:58,296 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:33:58,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:33:58,297 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 21:33:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:33:58,298 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:33:58,298 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:33:58,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:33:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:33:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:33:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:33:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:33:58,302 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:33:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:33:58,302 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:33:58,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:33:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:33:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:33:58,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:33:58,302 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-23 21:33:58,303 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:33:58,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:33:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-23 21:33:58,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:33:58,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:33:58,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:58,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:33:58,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:33:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:33:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:59,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:33:59,340 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 [2018-09-23 21:33:59,347 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:33:59,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:33:59,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:33:59,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:33:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:33:59,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:33:59,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:33:59,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:33:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:33:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:33:59,403 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-23 21:34:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:00,622 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:34:00,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:34:00,622 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-23 21:34:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:00,623 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:34:00,623 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:34:00,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:34:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:34:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:34:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:34:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:34:00,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:34:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:00,628 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:34:00,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:34:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:34:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:34:00,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:00,629 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-23 21:34:00,629 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:00,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-23 21:34:00,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:00,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:00,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:00,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:00,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:01,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:01,827 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 [2018-09-23 21:34:01,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:01,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:01,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:01,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:34:01,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:34:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:34:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:34:01,914 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 21:34:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:03,287 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:34:03,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:34:03,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 21:34:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:03,289 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:34:03,289 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:34:03,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:34:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:34:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:34:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:34:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:34:03,293 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:34:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:03,294 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:34:03,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:34:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:34:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:34:03,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:03,294 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-23 21:34:03,295 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:03,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-23 21:34:03,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:03,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:03,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:03,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:04,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:04,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:04,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:04,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:04,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:04,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:04,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:04,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:34:04,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:34:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:34:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:34:04,439 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-23 21:34:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:05,717 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:34:05,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:34:05,717 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-23 21:34:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:05,718 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:34:05,718 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:34:05,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:34:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:34:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:34:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:34:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:34:05,723 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:34:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:05,723 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:34:05,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:34:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:34:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:34:05,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:05,724 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-23 21:34:05,724 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:05,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-23 21:34:05,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:05,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:05,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:05,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:05,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:06,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:06,936 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 [2018-09-23 21:34:06,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:06,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:34:06,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:06,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:07,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:07,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:34:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:34:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:34:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:34:07,026 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 21:34:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:08,522 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:34:08,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:34:08,522 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 21:34:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:08,523 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:34:08,523 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:34:08,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:34:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:34:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:34:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:34:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:34:08,527 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:34:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:08,528 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:34:08,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:34:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:34:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:34:08,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:08,528 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-23 21:34:08,529 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:08,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-23 21:34:08,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:08,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:08,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:09,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:09,801 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 [2018-09-23 21:34:09,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:09,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:09,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:09,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:09,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:09,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:34:09,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:34:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:34:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:34:09,859 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-23 21:34:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:11,252 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:34:11,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:34:11,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-23 21:34:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:11,253 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:34:11,254 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:34:11,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:34:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:34:11,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:34:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:34:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:34:11,257 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:34:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:11,257 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:34:11,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:34:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:34:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:34:11,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:11,258 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-23 21:34:11,258 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:11,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-23 21:34:11,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:11,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:11,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:11,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:13,239 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 [2018-09-23 21:34:13,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:13,268 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:34:13,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:13,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:13,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:13,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:34:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:34:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:34:13,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:34:13,302 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 21:34:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:14,784 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:34:14,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:34:14,785 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 21:34:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:14,785 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:34:14,786 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:34:14,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:34:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:34:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:34:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:34:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:34:14,790 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:34:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:14,790 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:34:14,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:34:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:34:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:34:14,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:14,791 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-23 21:34:14,791 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:14,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:14,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-23 21:34:14,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:14,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:14,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:14,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:16,249 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 [2018-09-23 21:34:16,256 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:16,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:34:16,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:16,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:16,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:16,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:34:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:34:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:34:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:34:16,325 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-23 21:34:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:17,966 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:34:17,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:34:17,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-23 21:34:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:17,967 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:34:17,967 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:34:17,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:34:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:34:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:34:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:34:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:34:17,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:34:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:17,971 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:34:17,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:34:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:34:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:34:17,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:17,972 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-23 21:34:17,972 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:17,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:17,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-23 21:34:17,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:17,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:19,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:19,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:19,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:19,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:19,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:34:19,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:34:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:34:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:34:19,391 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 21:34:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:20,972 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:34:20,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:34:20,973 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 21:34:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:20,973 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:34:20,974 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:34:20,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:34:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:34:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:34:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:34:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:34:20,979 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:34:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:20,979 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:34:20,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:34:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:34:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:34:20,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:20,980 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-23 21:34:20,980 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:20,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-23 21:34:20,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:20,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:20,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:20,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:22,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:22,926 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 [2018-09-23 21:34:22,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:22,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:22,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:22,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:22,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:22,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:34:22,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:34:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:34:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:34:22,987 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-23 21:34:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:24,831 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:34:24,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:34:24,831 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-23 21:34:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:24,832 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:34:24,833 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:34:24,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:34:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:34:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:34:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:34:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:34:24,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:34:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:24,837 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:34:24,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:34:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:34:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:34:24,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:24,838 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-23 21:34:24,838 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:24,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:24,838 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-23 21:34:24,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:24,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:24,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:24,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:26,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:26,241 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 [2018-09-23 21:34:26,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:26,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:34:26,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:26,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:26,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:26,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:34:26,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:34:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:34:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:34:26,311 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 21:34:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:28,045 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:34:28,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:34:28,045 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 21:34:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:28,046 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:34:28,046 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:34:28,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:34:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:34:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:34:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:34:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:34:28,050 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:34:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:28,051 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:34:28,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:34:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:34:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:34:28,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:28,051 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-23 21:34:28,052 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:28,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-23 21:34:28,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:28,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:29,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:29,493 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 [2018-09-23 21:34:29,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:29,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:29,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:29,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:29,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:29,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:34:29,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:34:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:34:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:34:29,554 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-23 21:34:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:31,316 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:34:31,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:34:31,317 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-23 21:34:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:31,318 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:34:31,318 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:34:31,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:34:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:34:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:34:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:34:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:34:31,323 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:34:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:31,324 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:34:31,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:34:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:34:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:34:31,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:31,324 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-23 21:34:31,325 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:31,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-23 21:34:31,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:31,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:31,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:31,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:31,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:32,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:32,876 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 [2018-09-23 21:34:32,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:32,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:34:32,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:32,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:32,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:32,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:34:32,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:34:32,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:34:32,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:32,968 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 21:34:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:34,990 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:34:34,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:34:34,990 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 21:34:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:34,991 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:34:34,991 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:34:34,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:34:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:34:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:34:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:34:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:34:34,995 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:34:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:34,995 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:34:34,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:34:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:34:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:34:34,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:34,996 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-23 21:34:34,996 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:34,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-23 21:34:34,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:34,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:34,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:34,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:34,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:36,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:36,660 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 [2018-09-23 21:34:36,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:34:36,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:34:36,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:36,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:36,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:36,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:34:36,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:34:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:34:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:34:36,734 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-23 21:34:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:38,796 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:34:38,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:34:38,797 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-23 21:34:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:38,798 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:34:38,798 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:34:38,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:34:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:34:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:34:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:34:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:34:38,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:34:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:38,802 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:34:38,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:34:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:34:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:34:38,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:38,802 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-23 21:34:38,802 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:38,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:38,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-23 21:34:38,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:38,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:38,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:38,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:38,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:40,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:40,438 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 [2018-09-23 21:34:40,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:40,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:40,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:40,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:34:40,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:34:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:34:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:40,502 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 21:34:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:42,445 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:34:42,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:34:42,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 21:34:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:42,446 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:34:42,446 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:34:42,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:34:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:34:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:34:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:34:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:34:42,451 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:34:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:42,451 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:34:42,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:34:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:34:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:34:42,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:42,452 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-23 21:34:42,452 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:42,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-23 21:34:42,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:42,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:42,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:42,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:34:42,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:44,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:44,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:34:44,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:34:44,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:34:44,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:44,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:44,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:44,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:34:44,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:34:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:34:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:34:44,391 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-23 21:34:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:46,479 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:34:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:34:46,480 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-23 21:34:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:46,481 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:34:46,481 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:34:46,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:34:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:34:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:34:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:34:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:34:46,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:34:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:46,486 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:34:46,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:34:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:34:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:34:46,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:46,487 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-23 21:34:46,487 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:46,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-23 21:34:46,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:46,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:46,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:48,198 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 [2018-09-23 21:34:48,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:34:48,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:34:48,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:48,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:48,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:48,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:34:48,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:34:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:34:48,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:34:48,281 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 21:34:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:50,591 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:34:50,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:34:50,591 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 21:34:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:50,592 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:34:50,592 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:34:50,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:34:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:34:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:34:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:34:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:34:50,597 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:34:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:50,598 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:34:50,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:34:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:34:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:34:50,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:50,598 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-23 21:34:50,599 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:50,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:50,599 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-23 21:34:50,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:50,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:50,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:50,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:52,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:52,740 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 [2018-09-23 21:34:52,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:34:52,768 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:34:52,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:52,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:52,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:52,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:34:52,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:34:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:34:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:34:52,805 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-23 21:34:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:55,168 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:34:55,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:34:55,169 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-23 21:34:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:55,169 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:34:55,169 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:34:55,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:34:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:34:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:34:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:34:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:34:55,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 21:34:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:55,174 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:34:55,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:34:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:34:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:34:55,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:55,175 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-23 21:34:55,175 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:55,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:55,175 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-23 21:34:55,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:55,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:55,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:55,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:34:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:56,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:34:56,946 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 [2018-09-23 21:34:56,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:34:56,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:34:56,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:34:56,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:34:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:34:57,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:34:57,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:34:57,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:34:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:34:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:34:57,021 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 21:34:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:34:59,415 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 21:34:59,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:34:59,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 21:34:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:34:59,417 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:34:59,417 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:34:59,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:34:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:34:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:34:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:34:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:34:59,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 21:34:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:34:59,421 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:34:59,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:34:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:34:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:34:59,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:34:59,422 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-23 21:34:59,422 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:34:59,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:34:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-23 21:34:59,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:34:59,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:34:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:34:59,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:34:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:01,288 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 [2018-09-23 21:35:01,297 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:01,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:35:01,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:01,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:01,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:01,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:35:01,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:35:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:35:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:35:01,380 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-23 21:35:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:03,668 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:35:03,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:35:03,669 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-23 21:35:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:03,669 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:35:03,670 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:35:03,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:35:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:35:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:35:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:35:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:35:03,673 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 21:35:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:03,674 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:35:03,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:35:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:35:03,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:35:03,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:03,674 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-23 21:35:03,674 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:03,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-23 21:35:03,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:03,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:03,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:03,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:05,792 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 [2018-09-23 21:35:05,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:05,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:05,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:05,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:35:05,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:35:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:35:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:35:05,868 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 21:35:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:08,277 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 21:35:08,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:35:08,278 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 21:35:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:08,278 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:35:08,279 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:35:08,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:35:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:35:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:35:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:35:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:35:08,282 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 21:35:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:08,283 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:35:08,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:35:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:35:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:35:08,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:08,283 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-23 21:35:08,284 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:08,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-23 21:35:08,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:08,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:08,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:08,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:08,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:10,446 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 [2018-09-23 21:35:10,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:10,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:10,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:10,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:10,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:10,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:35:10,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:35:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:35:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:35:10,529 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-23 21:35:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:13,041 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:35:13,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:35:13,042 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-23 21:35:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:13,043 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:35:13,043 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:35:13,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:35:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:35:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:35:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:35:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:35:13,048 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 21:35:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:13,048 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:35:13,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:35:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:35:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:35:13,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:13,049 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-23 21:35:13,049 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:13,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-23 21:35:13,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:13,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:13,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:13,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:13,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:15,377 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 [2018-09-23 21:35:15,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:15,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:35:15,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:15,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:15,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:15,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:35:15,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:35:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:35:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:35:15,473 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 21:35:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:18,382 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 21:35:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:35:18,382 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 21:35:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:18,383 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:35:18,383 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:35:18,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:35:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:35:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:35:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:35:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:35:18,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 21:35:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:18,388 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:35:18,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:35:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:35:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:35:18,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:18,389 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-23 21:35:18,389 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:18,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-23 21:35:18,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:18,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:18,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:18,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:18,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:20,825 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 [2018-09-23 21:35:20,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:20,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:20,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:20,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:20,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:20,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:35:20,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:35:20,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:35:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:35:20,968 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-23 21:35:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:23,609 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:35:23,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:35:23,610 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-23 21:35:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:23,611 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:35:23,611 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:35:23,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:35:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:35:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:35:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:35:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:35:23,615 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 21:35:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:23,615 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:35:23,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:35:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:35:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:35:23,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:23,616 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-23 21:35:23,616 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:23,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-23 21:35:23,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:23,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:23,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:23,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:26,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:26,007 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 [2018-09-23 21:35:26,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:35:26,047 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:35:26,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:26,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:26,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:26,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:35:26,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:35:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:35:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:35:26,087 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 21:35:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:28,770 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 21:35:28,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:35:28,771 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 21:35:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:28,772 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:35:28,772 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:35:28,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:35:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:35:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:35:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:35:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:35:28,777 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 21:35:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:28,777 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:35:28,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:35:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:35:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:35:28,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:28,778 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-23 21:35:28,778 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:28,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-23 21:35:28,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:28,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:28,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:31,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:31,388 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 [2018-09-23 21:35:31,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:35:31,435 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:35:31,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:31,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:31,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:31,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:35:31,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:35:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:35:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:35:31,474 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-23 21:35:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:34,255 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:35:34,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:35:34,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-23 21:35:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:34,256 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:35:34,257 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:35:34,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:35:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:35:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:35:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:35:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:35:34,260 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 21:35:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:34,261 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:35:34,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:35:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:35:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:35:34,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:34,261 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-23 21:35:34,262 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:34,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-23 21:35:34,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:34,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:34,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:34,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:34,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:36,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:36,708 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 [2018-09-23 21:35:36,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:36,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:36,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:36,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:35:36,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:35:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:35:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:35:36,776 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 21:35:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:39,679 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 21:35:39,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:35:39,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 21:35:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:39,680 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:35:39,680 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:35:39,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:35:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:35:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:35:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:35:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:35:39,685 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 21:35:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:39,685 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:35:39,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:35:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:35:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:35:39,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:39,686 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-23 21:35:39,687 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:39,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-23 21:35:39,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:39,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:39,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:39,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:35:39,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:42,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:42,234 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 [2018-09-23 21:35:42,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:35:42,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:35:42,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:42,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:42,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:42,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:35:42,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:35:42,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:35:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:35:42,304 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-23 21:35:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:45,419 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:35:45,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:35:45,419 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-23 21:35:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:45,420 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:35:45,420 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:35:45,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:35:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:35:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:35:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:35:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:35:45,425 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 21:35:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:45,425 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:35:45,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:35:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:35:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:35:45,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:45,426 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-23 21:35:45,427 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:45,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-23 21:35:45,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:45,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:45,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:45,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:45,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:47,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:47,769 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 [2018-09-23 21:35:47,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:35:47,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:35:47,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:47,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:47,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:47,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:35:47,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:35:47,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:35:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:35:47,904 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 21:35:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:51,562 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 21:35:51,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:35:51,563 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 21:35:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:51,564 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:35:51,564 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:35:51,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:35:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:35:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:35:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:35:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:35:51,569 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 21:35:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:51,570 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:35:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:35:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:35:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:35:51,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:51,570 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-23 21:35:51,571 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:51,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:51,571 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-23 21:35:51,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:51,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:51,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:35:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:53,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:35:53,998 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 [2018-09-23 21:35:54,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:35:54,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:35:54,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:35:54,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:35:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:35:54,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:35:54,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:35:54,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:35:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:35:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:35:54,067 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-23 21:35:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:35:58,241 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:35:58,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:35:58,242 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-23 21:35:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:35:58,243 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:35:58,243 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:35:58,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:35:58,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:35:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:35:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:35:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:35:58,249 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 21:35:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:35:58,249 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:35:58,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:35:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:35:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:35:58,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:35:58,250 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-23 21:35:58,250 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:35:58,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:35:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-23 21:35:58,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:35:58,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:35:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:35:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:35:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:01,176 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 [2018-09-23 21:36:01,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:01,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:36:01,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:01,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:01,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:01,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:36:01,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:36:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:36:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:36:01,668 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 21:36:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:04,988 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 21:36:04,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:36:04,988 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 21:36:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:04,989 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:36:04,990 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:36:04,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:36:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:36:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:36:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:36:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:36:04,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 21:36:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:04,997 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:36:04,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:36:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:36:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:36:04,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:04,998 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-23 21:36:04,998 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:04,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-23 21:36:04,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:04,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:04,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:04,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:04,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:08,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:08,542 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 [2018-09-23 21:36:08,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:08,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:36:08,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:08,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:08,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:08,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:36:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:36:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:36:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:36:08,761 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-23 21:36:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:12,229 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:36:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:36:12,229 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-23 21:36:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:12,230 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:36:12,230 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:36:12,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:36:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:36:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:36:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:36:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:36:12,236 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 21:36:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:12,236 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:36:12,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:36:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:36:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:36:12,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:12,237 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-23 21:36:12,237 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:12,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-23 21:36:12,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:12,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:12,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:12,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:15,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:15,478 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 [2018-09-23 21:36:15,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:15,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:15,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:15,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:36:15,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:36:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:36:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:36:15,565 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 21:36:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:19,138 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 21:36:19,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:36:19,139 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 21:36:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:19,140 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:36:19,140 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:36:19,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:36:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:36:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:36:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:36:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:36:19,144 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 21:36:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:19,145 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:36:19,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:36:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:36:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:36:19,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:19,145 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-23 21:36:19,145 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:19,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-23 21:36:19,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:19,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:19,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:19,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:19,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:23,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:23,581 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 [2018-09-23 21:36:23,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:23,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:23,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:23,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:23,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:23,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:36:23,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:36:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:36:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:36:23,671 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-23 21:36:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:27,288 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:36:27,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:36:27,289 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-23 21:36:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:27,290 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:36:27,290 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:36:27,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:36:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:36:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:36:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:36:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:36:27,294 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 21:36:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:36:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:36:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:36:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:36:27,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:27,295 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-23 21:36:27,295 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:27,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-23 21:36:27,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:27,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:29,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:29,938 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 [2018-09-23 21:36:29,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:29,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:36:29,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:29,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:30,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:30,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:36:30,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:36:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:36:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:36:30,047 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 21:36:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:33,774 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 21:36:33,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:36:33,774 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 21:36:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:33,775 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:36:33,775 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:36:33,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:36:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:36:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:36:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:36:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:36:33,779 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 21:36:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:33,779 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:36:33,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:36:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:36:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:36:33,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:33,780 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-23 21:36:33,780 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:33,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-23 21:36:33,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:33,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:33,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:33,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:33,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:37,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:37,607 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 [2018-09-23 21:36:37,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:37,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:37,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:37,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:37,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:37,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:36:37,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:36:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:36:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:36:37,681 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-23 21:36:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:41,383 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:36:41,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:36:41,383 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-23 21:36:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:41,384 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:36:41,384 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:36:41,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:36:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:36:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:36:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:36:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:36:41,387 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 21:36:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:41,388 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:36:41,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:36:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:36:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:36:41,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:41,388 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-23 21:36:41,388 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:41,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-23 21:36:41,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:41,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:41,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:41,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:41,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:44,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:44,356 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 [2018-09-23 21:36:44,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:44,402 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:36:44,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:44,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:44,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:44,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:36:44,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:36:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:36:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:36:44,514 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 21:36:48,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:48,450 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 21:36:48,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:36:48,450 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 21:36:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:48,451 INFO L225 Difference]: With dead ends: 82 [2018-09-23 21:36:48,451 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:36:48,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:36:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:36:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:36:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:36:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:36:48,457 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 21:36:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:48,457 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:36:48,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:36:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:36:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:36:48,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:48,458 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-23 21:36:48,458 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:48,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:48,458 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-23 21:36:48,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:48,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:52,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:36:52,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:52,141 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:36:52,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:52,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:52,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:36:52,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:36:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:36:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:36:52,187 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-23 21:36:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:56,003 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:36:56,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:36:56,004 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-23 21:36:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:56,005 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:36:56,005 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:36:56,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:36:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:36:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:36:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:36:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:36:56,009 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 21:36:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:56,009 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:36:56,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:36:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:36:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:36:56,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:56,010 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-23 21:36:56,010 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:56,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-23 21:36:56,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:56,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:56,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:59,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:59,176 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 [2018-09-23 21:36:59,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:59,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:59,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:59,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:36:59,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:36:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:36:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:36:59,294 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 21:37:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:03,371 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 21:37:03,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:37:03,372 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 21:37:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:03,373 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:37:03,373 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:37:03,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:37:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:37:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:37:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:37:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:37:03,379 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 21:37:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:03,379 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:37:03,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:37:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:37:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:37:03,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:03,380 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-23 21:37:03,380 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:03,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-23 21:37:03,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:03,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:03,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:03,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:06,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:06,901 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 [2018-09-23 21:37:06,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:06,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:06,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:06,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:06,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:06,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:37:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:37:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:37:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:37:06,989 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-23 21:37:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:11,090 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:37:11,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:37:11,090 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-23 21:37:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:11,091 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:37:11,091 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:37:11,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:37:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:37:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:37:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:37:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:37:11,096 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 21:37:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:11,096 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:37:11,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:37:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:37:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:37:11,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:11,097 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-23 21:37:11,097 INFO L423 AbstractCegarLoop]: === Iteration 82 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:11,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-23 21:37:11,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:11,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:11,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:11,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:37:11,537 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:37:11,541 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:37:11,541 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:37:11 BoogieIcfgContainer [2018-09-23 21:37:11,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:37:11,542 INFO L168 Benchmark]: Toolchain (without parser) took 242251.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -146.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 250.9 MB). Peak memory consumption was 104.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:11,543 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:11,544 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:11,544 INFO L168 Benchmark]: Boogie Preprocessor took 25.07 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:37:11,544 INFO L168 Benchmark]: RCFGBuilder took 228.06 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. [2018-09-23 21:37:11,545 INFO L168 Benchmark]: TraceAbstraction took 241946.93 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -146.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 229.7 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. [2018-09-23 21:37:11,547 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 0.24 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 45.45 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 25.07 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 228.06 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 241946.93 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -146.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 229.7 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 84 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 29 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 241.8s OverallTime, 82 OverallIterations, 81 TraceHistogramMax, 122.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 163 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 187085 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6641 GetRequests, 3240 SyntacticMatches, 80 SemanticMatches, 3321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=81, 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, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 112.7s InterpolantComputationTime, 6802 NumberOfCodeBlocks, 6802 NumberOfCodeBlocksAsserted, 981 NumberOfCheckSat, 6641 ConstructedInterpolants, 0 QuantifiedInterpolants, 2526167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6880 ConjunctsInSsa, 6720 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/177120 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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-37-11-565.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-37-11-565.csv Completed graceful shutdown