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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:36:34,148 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:36:34,150 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:36:34,166 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:36:34,167 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:36:34,168 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:36:34,169 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:36:34,171 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:36:34,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:36:34,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:36:34,174 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:36:34,206 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 [2018-09-30 10:36:34,233 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:36:34,233 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:36:34,234 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:36:34,234 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:36:34,235 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:36:34,235 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:36:34,235 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:36:34,235 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:36:34,235 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:36:34,236 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:36:34,236 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:36:34,236 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:36:34,236 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:36:34,236 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:36:34,237 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:36:34,237 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:36:34,237 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:36:34,237 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:36:34,237 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:36:34,237 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:36:34,238 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:36:34,238 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:36:34,238 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:36:34,238 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:36:34,238 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:36:34,239 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:36:34,239 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:36:34,239 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:36:34,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:36:34,239 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:36:34,281 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:36:34,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:36:34,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:36:34,302 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:36:34,302 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:36:34,303 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-30 10:36:34,303 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-30 10:36:34,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:36:34,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:36:34,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:36:34,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:36:34,367 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:36:34,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,409 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:36:34,409 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:36:34,410 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:36:34,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:36:34,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:36:34,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:36:34,413 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:36:34,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/1) ... [2018-09-30 10:36:34,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:36:34,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:36:34,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:36:34,439 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:36:34,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (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 [2018-09-30 10:36:34,507 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-30 10:36:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-30 10:36:34,736 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:36:34,736 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:36:34 BoogieIcfgContainer [2018-09-30 10:36:34,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:36:34,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:36:34,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:36:34,741 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:36:34,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:36:34" (1/2) ... [2018-09-30 10:36:34,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b23d7b and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:36:34, skipping insertion in model container [2018-09-30 10:36:34,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:36:34" (2/2) ... [2018-09-30 10:36:34,745 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-30 10:36:34,755 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:36:34,763 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-30 10:36:34,820 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:36:34,821 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:36:34,821 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:36:34,821 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:36:34,821 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:36:34,821 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:36:34,822 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:36:34,822 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:36:34,822 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:36:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-30 10:36:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:36:34,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:34,859 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:36:34,861 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:34,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-30 10:36:34,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:34,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:34,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:34,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,058 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:36:35,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:36:35,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:36:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:36:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:36:35,076 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-30 10:36:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,156 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-30 10:36:35,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:36:35,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 10:36:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,171 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:36:35,178 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:36:35,188 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 [2018-09-30 10:36:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:36:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:36:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:36:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:36:35,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-30 10:36:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,234 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:36:35,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:36:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:36:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:36:35,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,235 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:36:35,235 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,235 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-30 10:36:35,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,268 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:36:35,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:36:35,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:36:35,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:36:35,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:36:35,271 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-30 10:36:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,340 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:36:35,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:36:35,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 10:36:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,342 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:36:35,342 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:36:35,343 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 [2018-09-30 10:36:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:36:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:36:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:36:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 10:36:35,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 10:36:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,355 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 10:36:35,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:36:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 10:36:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:36:35,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,357 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 10:36:35,357 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-30 10:36:35,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,455 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:36:35,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 10:36:35,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:36:35,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:36:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:36:35,456 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 10:36:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,522 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:36:35,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:36:35,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:36:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,523 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:36:35,523 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:36:35,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:36:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:36:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:36:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:36:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 10:36:35,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 10:36:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,527 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 10:36:35,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:36:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 10:36:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:36:35,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,529 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:36:35,529 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-30 10:36:35,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:35,665 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 [2018-09-30 10:36:35,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:35,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 10:36:35,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:36:35,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:36:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:36:35,757 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-30 10:36:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,800 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-30 10:36:35,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:36:35,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-30 10:36:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,802 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:36:35,802 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:36:35,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:36:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:36:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-30 10:36:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:36:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 10:36:35,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-30 10:36:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,807 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 10:36:35,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:36:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 10:36:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:36:35,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,808 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:36:35,809 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-30 10:36:35,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:35,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:35,867 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 [2018-09-30 10:36:35,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:35,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:35,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:35,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:35,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:36:35,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:36:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:36:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:35,957 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-30 10:36:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:36,126 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-30 10:36:36,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:36:36,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:36:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:36,128 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:36:36,128 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:36:36,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:36:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:36:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:36:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 10:36:36,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-30 10:36:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:36,132 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 10:36:36,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:36:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 10:36:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:36:36,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:36,133 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:36:36,133 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:36,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-30 10:36:36,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:36,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:36,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:36,235 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 [2018-09-30 10:36:36,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:36,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-30 10:36:36,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:36,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:36,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:36:36,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:36:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:36:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:36,287 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-30 10:36:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:36,412 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 10:36:36,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:36:36,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:36:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:36,414 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:36:36,415 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:36:36,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:36:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:36:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:36:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-30 10:36:36,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-30 10:36:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:36,419 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-30 10:36:36,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:36:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-30 10:36:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:36:36,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:36,420 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-30 10:36:36,421 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:36,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-30 10:36:36,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:36,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:36,580 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 [2018-09-30 10:36:36,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:36,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:36,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:36,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:36,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:36:36,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:36:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:36:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:36,639 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-30 10:36:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:36,725 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-30 10:36:36,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:36:36,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-30 10:36:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:36,726 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:36:36,727 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:36:36,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:36:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:36:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-30 10:36:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:36:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 10:36:36,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 10:36:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:36,731 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 10:36:36,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:36:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 10:36:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:36:36,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:36,732 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 10:36:36,733 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:36,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-30 10:36:36,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:36,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:36,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:36,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:36,822 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 [2018-09-30 10:36:36,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:36,844 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-30 10:36:36,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:36,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:36,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:36:36,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:36:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:36:36,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:36,877 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-30 10:36:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:36,919 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-30 10:36:36,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:36:36,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 10:36:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:36,920 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:36:36,920 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:36:36,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:36:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:36:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:36:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 10:36:36,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-30 10:36:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:36,924 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 10:36:36,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:36:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 10:36:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:36:36,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:36,925 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-30 10:36:36,926 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:36,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-30 10:36:36,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:36,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:36,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:36,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:36,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:36,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:37,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:37,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-30 10:36:37,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:37,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:37,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:36:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:36:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:36:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:37,054 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-30 10:36:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:37,093 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-30 10:36:37,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:36:37,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 10:36:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:37,094 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:36:37,094 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:36:37,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:36:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:36:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:36:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-30 10:36:37,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-30 10:36:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:37,098 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-30 10:36:37,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:36:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-30 10:36:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:36:37,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:37,099 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:36:37,099 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:37,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-30 10:36:37,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:37,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:37,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:37,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:37,236 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 [2018-09-30 10:36:37,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:37,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:37,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:36:37,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:36:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:36:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:37,284 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-30 10:36:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:37,629 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-30 10:36:37,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:36:37,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-30 10:36:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:37,630 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:36:37,630 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:36:37,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:36:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:36:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 10:36:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:36:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 10:36:37,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-30 10:36:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:37,634 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 10:36:37,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:36:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 10:36:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:36:37,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:37,635 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 10:36:37,635 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:37,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-30 10:36:37,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:37,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:37,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:37,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:37,849 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 [2018-09-30 10:36:37,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:37,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:37,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:37,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:37,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:37,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:36:37,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:36:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:36:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:37,901 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-30 10:36:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:37,942 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-30 10:36:37,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:36:37,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 10:36:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:37,943 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:36:37,943 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:36:37,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:36:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:36:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:36:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 10:36:37,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-30 10:36:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:37,948 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 10:36:37,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:36:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 10:36:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:36:37,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:37,949 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-30 10:36:37,949 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:37,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-30 10:36:37,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:37,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:38,055 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 [2018-09-30 10:36:38,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:38,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:36:38,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:38,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:36:38,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:36:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:36:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:38,108 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-30 10:36:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:38,146 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-30 10:36:38,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:36:38,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 10:36:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:38,148 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:36:38,148 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:36:38,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:36:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:36:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:36:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-30 10:36:38,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-30 10:36:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:38,152 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-30 10:36:38,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:36:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-30 10:36:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:36:38,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:38,153 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-30 10:36:38,154 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:38,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-30 10:36:38,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:38,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:38,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:38,351 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 [2018-09-30 10:36:38,371 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:38,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:38,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:38,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:36:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:36:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:36:38,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:38,422 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-30 10:36:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:38,496 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-30 10:36:38,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:36:38,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-30 10:36:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:38,498 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:36:38,498 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:36:38,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:36:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:36:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-30 10:36:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:36:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 10:36:38,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 10:36:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:38,503 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 10:36:38,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:36:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 10:36:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:36:38,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:38,504 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 10:36:38,504 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:38,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-30 10:36:38,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:38,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:38,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:38,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:38,609 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 [2018-09-30 10:36:38,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:38,647 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:36:38,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:38,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:36:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:36:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:36:38,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:38,681 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-30 10:36:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:38,747 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-30 10:36:38,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:36:38,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 10:36:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:38,748 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:36:38,748 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:36:38,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:36:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:36:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:36:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-30 10:36:38,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-30 10:36:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:38,752 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-30 10:36:38,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:36:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-30 10:36:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:36:38,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:38,753 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-30 10:36:38,754 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:38,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-30 10:36:38,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:38,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:38,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:38,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:38,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:38,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:38,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:36:38,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:38,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:38,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:38,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:36:38,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:36:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:36:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:38,941 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-30 10:36:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,000 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-30 10:36:39,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:36:39,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 10:36:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,001 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:36:39,002 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:36:39,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:36:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:36:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:36:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-30 10:36:39,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-30 10:36:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,006 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-30 10:36:39,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:36:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-30 10:36:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:36:39,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,007 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-30 10:36:39,008 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-30 10:36:39,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:39,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:39,199 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 [2018-09-30 10:36:39,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:39,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:39,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:36:39,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:36:39,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:36:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:39,277 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-30 10:36:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,409 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-30 10:36:39,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:36:39,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-30 10:36:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,410 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:36:39,410 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:36:39,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:36:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:36:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 10:36:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:36:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-30 10:36:39,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-30 10:36:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,414 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-30 10:36:39,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:36:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-30 10:36:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:36:39,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,415 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 10:36:39,416 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-30 10:36:39,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:39,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:39,523 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 [2018-09-30 10:36:39,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:39,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:39,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:39,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:39,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:36:39,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:36:39,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:36:39,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:39,579 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-30 10:36:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,666 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-30 10:36:39,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:36:39,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 10:36:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,668 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:36:39,668 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:36:39,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:36:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:36:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:36:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-30 10:36:39,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-30 10:36:39,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,673 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-30 10:36:39,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:36:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-30 10:36:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:36:39,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,673 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-30 10:36:39,674 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,674 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-30 10:36:39,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:39,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:39,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:39,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:39,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:36:39,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:39,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:39,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:36:39,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:36:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:36:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:39,831 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-30 10:36:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,874 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-30 10:36:39,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:36:39,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 10:36:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,875 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:36:39,875 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:36:39,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:36:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:36:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:36:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-30 10:36:39,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-30 10:36:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,879 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-30 10:36:39,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:36:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-30 10:36:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:36:39,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,880 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-30 10:36:39,881 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-30 10:36:39,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:39,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:40,023 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 [2018-09-30 10:36:40,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:40,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:40,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:40,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:40,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:36:40,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:36:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:36:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:40,159 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-30 10:36:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:40,429 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-30 10:36:40,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:36:40,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-30 10:36:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:40,431 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:36:40,431 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:36:40,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:36:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:36:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-30 10:36:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:36:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 10:36:40,437 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-30 10:36:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:40,437 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 10:36:40,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:36:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 10:36:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:36:40,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:40,439 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 10:36:40,439 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:40,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-30 10:36:40,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:40,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:40,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:40,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:40,544 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 [2018-09-30 10:36:40,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:40,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 10:36:40,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:40,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:40,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:36:40,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:36:40,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:36:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:40,637 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-30 10:36:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:40,698 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-30 10:36:40,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:36:40,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 10:36:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:40,699 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:36:40,699 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:36:40,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:36:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:36:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:36:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-30 10:36:40,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-30 10:36:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:40,705 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-30 10:36:40,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:36:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-30 10:36:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:36:40,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:40,706 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-30 10:36:40,706 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:40,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-30 10:36:40,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:40,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:40,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:40,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:40,803 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 [2018-09-30 10:36:40,811 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:40,823 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 10:36:40,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:40,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:40,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:40,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:36:40,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:36:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:36:40,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:40,867 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-30 10:36:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:40,920 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-30 10:36:40,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:36:40,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 10:36:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:40,922 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:36:40,922 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:36:40,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:36:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:36:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:36:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-30 10:36:40,926 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-30 10:36:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:40,927 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-30 10:36:40,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:36:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-30 10:36:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:36:40,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:40,927 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-30 10:36:40,928 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:40,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:40,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-30 10:36:40,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:40,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:40,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:40,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:41,069 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 [2018-09-30 10:36:41,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:41,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:41,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:36:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:36:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:36:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:41,200 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-30 10:36:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:41,448 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-30 10:36:41,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:36:41,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-30 10:36:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:41,450 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:36:41,451 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:36:41,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:36:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:36:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 10:36:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:36:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-30 10:36:41,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-30 10:36:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:41,456 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-30 10:36:41,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:36:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-30 10:36:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:36:41,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:41,457 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 10:36:41,457 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:41,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-30 10:36:41,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:41,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:41,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:41,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:41,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:41,902 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 [2018-09-30 10:36:41,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:41,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:41,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:41,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:41,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:41,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:41,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:41,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:41,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:41,981 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-30 10:36:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:42,189 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-30 10:36:42,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:42,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 10:36:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:42,193 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:36:42,193 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:36:42,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:36:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:36:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:36:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-30 10:36:42,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-30 10:36:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:42,201 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-30 10:36:42,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-30 10:36:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:36:42,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:42,202 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-30 10:36:42,202 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:42,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-30 10:36:42,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:42,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:42,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:42,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:42,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:42,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:42,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:36:42,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:42,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:42,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:42,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:42,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,475 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-30 10:36:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:42,567 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-30 10:36:42,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:42,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 10:36:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:42,568 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:36:42,568 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:36:42,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:36:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:36:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:36:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-30 10:36:42,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-30 10:36:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:42,573 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-30 10:36:42,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-30 10:36:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:36:42,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:42,574 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-30 10:36:42,574 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:42,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-30 10:36:42,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:42,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:42,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:42,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:42,711 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 [2018-09-30 10:36:42,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:42,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:42,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:42,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:42,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:42,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:36:42,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:36:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:36:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,840 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-30 10:36:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:42,986 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-30 10:36:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:36:42,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-30 10:36:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:42,988 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:36:42,988 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:36:42,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:36:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:36:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-30 10:36:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:36:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 10:36:42,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-30 10:36:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:42,994 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 10:36:42,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:36:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 10:36:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:36:42,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:42,995 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 10:36:42,995 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:42,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-30 10:36:42,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:42,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:42,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:42,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:42,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:43,434 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 [2018-09-30 10:36:43,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:43,501 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:36:43,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:43,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:43,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:36:43,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:36:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:36:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:43,534 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-30 10:36:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:43,600 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-30 10:36:43,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:36:43,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 10:36:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:43,601 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:36:43,602 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:36:43,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:36:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:36:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:36:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-30 10:36:43,607 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-30 10:36:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:43,607 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-30 10:36:43,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:36:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-30 10:36:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:36:43,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:43,608 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-30 10:36:43,608 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:43,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-30 10:36:43,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:43,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:43,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:43,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:43,883 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 [2018-09-30 10:36:43,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:43,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:36:43,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:43,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:43,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:36:43,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:36:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:36:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:43,952 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-30 10:36:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:44,001 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-30 10:36:44,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:36:44,002 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 10:36:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:44,002 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:36:44,002 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:36:44,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:36:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:36:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:36:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-30 10:36:44,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-30 10:36:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:44,006 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-30 10:36:44,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:36:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-30 10:36:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:36:44,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:44,007 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-30 10:36:44,008 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:44,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-30 10:36:44,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:44,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:44,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:44,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:44,363 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 [2018-09-30 10:36:44,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:44,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:44,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:36:44,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:36:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:36:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:44,435 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-30 10:36:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:44,625 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-30 10:36:44,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:36:44,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-30 10:36:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:44,627 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:36:44,627 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:36:44,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:36:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:36:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:36:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:36:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-30 10:36:44,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-30 10:36:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:44,632 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-30 10:36:44,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:36:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-30 10:36:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:36:44,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:44,633 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 10:36:44,634 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:44,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:44,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-30 10:36:44,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:44,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:44,790 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 [2018-09-30 10:36:44,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:44,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:44,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:44,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:44,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:44,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:36:44,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:36:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:36:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:44,858 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-30 10:36:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:44,929 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-30 10:36:44,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:36:44,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 10:36:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:44,930 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:36:44,930 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:36:44,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:36:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:36:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:36:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-30 10:36:44,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-30 10:36:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:44,936 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-30 10:36:44,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:36:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-30 10:36:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:36:44,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:44,937 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-30 10:36:44,937 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:44,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-30 10:36:44,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:44,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:44,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:44,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:45,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:45,993 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 [2018-09-30 10:36:46,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:46,024 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:36:46,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:46,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:46,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:36:46,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:36:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:36:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:46,062 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-30 10:36:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:46,108 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-30 10:36:46,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:36:46,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 10:36:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:46,109 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:36:46,109 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:36:46,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:36:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:36:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:36:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-30 10:36:46,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-30 10:36:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:46,114 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-30 10:36:46,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:36:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-30 10:36:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:36:46,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:46,115 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-30 10:36:46,115 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:46,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-30 10:36:46,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:46,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:46,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:46,360 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 [2018-09-30 10:36:46,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:46,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:46,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:46,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:46,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:36:46,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:36:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:36:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:46,412 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-30 10:36:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:46,616 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-30 10:36:46,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:36:46,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-30 10:36:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:46,617 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:36:46,617 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:36:46,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:36:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:36:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-30 10:36:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 10:36:46,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-30 10:36:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:46,623 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 10:36:46,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:36:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 10:36:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:36:46,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:46,624 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 10:36:46,624 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:46,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-30 10:36:46,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:46,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:46,820 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 [2018-09-30 10:36:46,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:46,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:36:46,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:46,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:46,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:46,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:36:46,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:36:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:36:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:46,885 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 10:36:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:47,001 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-30 10:36:47,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:36:47,002 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 10:36:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:47,002 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:36:47,002 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:36:47,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:36:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:36:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:36:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-30 10:36:47,006 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-30 10:36:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:47,006 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-30 10:36:47,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:36:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-30 10:36:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:36:47,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:47,007 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-30 10:36:47,008 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:47,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-30 10:36:47,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:47,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:47,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:47,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:47,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:47,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:47,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:36:47,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:47,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:47,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:36:47,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:36:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:36:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:47,325 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-30 10:36:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:47,393 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-30 10:36:47,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:36:47,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 10:36:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:47,394 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:36:47,394 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:36:47,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:36:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:36:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:36:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-30 10:36:47,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-30 10:36:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:47,399 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-30 10:36:47,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:36:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-30 10:36:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:36:47,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:47,400 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-30 10:36:47,400 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:47,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-30 10:36:47,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:47,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:47,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:47,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:47,631 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 [2018-09-30 10:36:47,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:47,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:47,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:36:47,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:36:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:36:47,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:47,697 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-30 10:36:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:48,027 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-30 10:36:48,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:36:48,027 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 10:36:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:48,028 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:36:48,028 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:36:48,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:36:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:36:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:36:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-30 10:36:48,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-30 10:36:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:48,035 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-30 10:36:48,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:36:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-30 10:36:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:36:48,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:48,036 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 10:36:48,036 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:48,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-30 10:36:48,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:48,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:48,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:48,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:48,201 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 [2018-09-30 10:36:48,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:48,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:48,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:48,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:48,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:36:48,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:36:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:36:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:48,259 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-30 10:36:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:48,354 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-30 10:36:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:36:48,354 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 10:36:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:48,355 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:36:48,355 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:36:48,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:36:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:36:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:36:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-30 10:36:48,360 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-30 10:36:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:48,360 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-30 10:36:48,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:36:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-30 10:36:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:36:48,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:48,361 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-30 10:36:48,362 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:48,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-30 10:36:48,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:48,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:48,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:48,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:48,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:48,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:48,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:36:48,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:48,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:48,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:48,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:36:48,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:36:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:36:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:48,645 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-30 10:36:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:48,963 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-30 10:36:48,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:36:48,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 10:36:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:48,964 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:36:48,964 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:36:48,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:36:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:36:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:36:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-30 10:36:48,970 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-30 10:36:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:48,971 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-30 10:36:48,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:36:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-30 10:36:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:36:48,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:48,972 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-30 10:36:48,972 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:48,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-30 10:36:48,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:48,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:48,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:48,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:49,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:49,363 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 [2018-09-30 10:36:49,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:49,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:49,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:49,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:49,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:49,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:36:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:36:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:36:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:49,426 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-30 10:36:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:49,894 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-30 10:36:49,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:36:49,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-30 10:36:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:49,895 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:36:49,895 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:36:49,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:36:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:36:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-30 10:36:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-30 10:36:49,899 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-30 10:36:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:49,899 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-30 10:36:49,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:36:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-30 10:36:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:36:49,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:49,900 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 10:36:49,900 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:49,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-30 10:36:49,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:49,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:49,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:49,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:50,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:50,293 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 [2018-09-30 10:36:50,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:50,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:36:50,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:50,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:50,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:50,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:36:50,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:36:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:36:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:50,355 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-30 10:36:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:50,459 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-30 10:36:50,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:36:50,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 10:36:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:50,460 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:36:50,460 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:36:50,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:36:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:36:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:36:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-30 10:36:50,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-30 10:36:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:50,465 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-30 10:36:50,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:36:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-30 10:36:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:36:50,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:50,466 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-30 10:36:50,466 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:50,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-30 10:36:50,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:50,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:50,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:50,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:50,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:50,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:50,627 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 [2018-09-30 10:36:50,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:50,661 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:36:50,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:50,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:50,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:50,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:36:50,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:36:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:36:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:50,692 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-30 10:36:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:50,746 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-30 10:36:50,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:36:50,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 10:36:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:50,747 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:36:50,747 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:36:50,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:36:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:36:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:36:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-30 10:36:50,750 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-30 10:36:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:50,750 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-30 10:36:50,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:36:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-30 10:36:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:36:50,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:50,750 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-30 10:36:50,751 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:50,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-30 10:36:50,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:50,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:50,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:50,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:50,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:51,051 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 [2018-09-30 10:36:51,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:51,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:36:51,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:36:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:36:51,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:51,120 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-30 10:36:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:51,386 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-30 10:36:51,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:36:51,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-30 10:36:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:51,387 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:36:51,388 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:36:51,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:36:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:36:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 10:36:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-30 10:36:51,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-30 10:36:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:51,392 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-30 10:36:51,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:36:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-30 10:36:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:36:51,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:51,393 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 10:36:51,393 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:51,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-30 10:36:51,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:51,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:51,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:51,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:51,775 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 [2018-09-30 10:36:51,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:51,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:51,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:51,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:51,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:51,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:36:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:36:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:36:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:51,840 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-30 10:36:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:51,944 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-30 10:36:51,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:36:51,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 10:36:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:51,945 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:36:51,945 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:36:51,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:36:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:36:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:36:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-30 10:36:51,949 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-30 10:36:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:51,949 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-30 10:36:51,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:36:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-30 10:36:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:36:51,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:51,950 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-30 10:36:51,950 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:51,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-30 10:36:51,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:51,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:51,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:51,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:52,130 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 [2018-09-30 10:36:52,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:52,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:36:52,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:52,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:52,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:36:52,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:36:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:36:52,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:52,198 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-30 10:36:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:52,309 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-30 10:36:52,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:36:52,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 10:36:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:52,311 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:36:52,311 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:36:52,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:36:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:36:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:36:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-30 10:36:52,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-30 10:36:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:52,314 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-30 10:36:52,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:36:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-30 10:36:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:36:52,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:52,315 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-30 10:36:52,315 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:52,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-30 10:36:52,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:52,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:52,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:52,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:52,534 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 [2018-09-30 10:36:52,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:52,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:52,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:52,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:52,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:36:52,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:36:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:36:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:52,592 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-30 10:36:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:52,906 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-30 10:36:52,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:36:52,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-30 10:36:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:52,908 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:36:52,908 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:36:52,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:36:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:36:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-30 10:36:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:36:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-30 10:36:52,913 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-30 10:36:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:52,913 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-30 10:36:52,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:36:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-30 10:36:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:36:52,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:52,914 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 10:36:52,914 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:52,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-30 10:36:52,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:52,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:52,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:52,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:53,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:53,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:53,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 10:36:53,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:53,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:53,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:36:53,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:36:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:36:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:53,286 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-30 10:36:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:53,398 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-30 10:36:53,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:36:53,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 10:36:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:53,399 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:36:53,399 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:36:53,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:36:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:36:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:36:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-30 10:36:53,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-30 10:36:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:53,403 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-30 10:36:53,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:36:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-30 10:36:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:36:53,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:53,404 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-30 10:36:53,404 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:53,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-30 10:36:53,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:53,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:53,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:53,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:53,620 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 [2018-09-30 10:36:53,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:53,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 10:36:53,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:53,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:53,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:53,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:36:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:36:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:36:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:53,686 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-30 10:36:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:53,760 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-30 10:36:53,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:36:53,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 10:36:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:53,761 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:36:53,761 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:36:53,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:36:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:36:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:36:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-30 10:36:53,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-30 10:36:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:53,765 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-30 10:36:53,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:36:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-30 10:36:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:36:53,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:53,766 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-30 10:36:53,766 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:53,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-30 10:36:53,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:53,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:53,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:53,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:54,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:54,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:54,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:54,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:54,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:54,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:36:54,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:36:54,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:36:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:54,393 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-30 10:36:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:54,822 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-30 10:36:54,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:36:54,822 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-30 10:36:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:54,823 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:36:54,823 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:36:54,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:36:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:36:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-30 10:36:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:36:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 10:36:54,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-30 10:36:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:54,828 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 10:36:54,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:36:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 10:36:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:36:54,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:54,828 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 10:36:54,828 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:54,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-30 10:36:54,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:54,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:54,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:54,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:54,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:55,081 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 [2018-09-30 10:36:55,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:55,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:55,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:55,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:55,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:36:55,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:36:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:36:55,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:55,140 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-30 10:36:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:55,230 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-30 10:36:55,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:36:55,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 10:36:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:55,231 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:36:55,231 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:36:55,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:36:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:36:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:36:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-30 10:36:55,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-30 10:36:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:55,235 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-30 10:36:55,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:36:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-30 10:36:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:36:55,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:55,235 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-30 10:36:55,236 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:55,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-30 10:36:55,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:55,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:55,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:55,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:55,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:55,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:55,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:36:55,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:55,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:55,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:36:55,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:36:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:36:55,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:55,502 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-30 10:36:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:55,573 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-30 10:36:55,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:36:55,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 10:36:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:55,574 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:36:55,574 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:36:55,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:36:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:36:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:36:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-30 10:36:55,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-30 10:36:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:55,579 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-30 10:36:55,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:36:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-30 10:36:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:36:55,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:55,579 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-30 10:36:55,580 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:55,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:55,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-30 10:36:55,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:55,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:55,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:55,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:55,914 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 [2018-09-30 10:36:55,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:55,944 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:55,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:55,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:55,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:55,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:36:55,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:36:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:36:55,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:55,976 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-30 10:36:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:56,737 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-30 10:36:56,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:36:56,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-30 10:36:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:56,738 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:36:56,738 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:36:56,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:36:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:36:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-30 10:36:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:36:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 10:36:56,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-30 10:36:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:56,742 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 10:36:56,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:36:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 10:36:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:36:56,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:56,743 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 10:36:56,743 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:56,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-30 10:36:56,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:56,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:56,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:56,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:56,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:56,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:56,929 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 [2018-09-30 10:36:56,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:56,966 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:36:56,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:56,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:57,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:57,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:36:57,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:36:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:36:57,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:57,009 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-30 10:36:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:58,407 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-30 10:36:58,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:36:58,407 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 10:36:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:58,408 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:36:58,408 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:36:58,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:36:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:36:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:36:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-30 10:36:58,410 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-30 10:36:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:58,411 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-30 10:36:58,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:36:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-30 10:36:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:36:58,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:58,411 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-30 10:36:58,411 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:58,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-30 10:36:58,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:58,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:58,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:58,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:58,776 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:36:58,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:58,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:58,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:58,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:36:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:36:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:36:58,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:58,807 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-30 10:36:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:58,880 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-30 10:36:58,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:36:58,881 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 10:36:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:58,882 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:36:58,882 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:36:58,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:36:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:36:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:36:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-30 10:36:58,887 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-30 10:36:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:58,887 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-30 10:36:58,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:36:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-30 10:36:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:36:58,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:58,888 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-30 10:36:58,888 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:58,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-30 10:36:58,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:58,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:58,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:58,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:59,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:59,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:59,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:59,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:59,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:59,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:36:59,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:36:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:36:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:59,505 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-30 10:36:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:59,947 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-30 10:36:59,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:36:59,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-30 10:36:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:59,949 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:36:59,949 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:36:59,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:36:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:36:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-30 10:36:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:36:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 10:36:59,955 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-30 10:36:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:59,955 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 10:36:59,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:36:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 10:36:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:36:59,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:59,956 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 10:36:59,956 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:59,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-30 10:36:59,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:59,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:59,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:59,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:59,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:00,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:00,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:00,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:00,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:00,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:00,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:00,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:00,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:37:00,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:37:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:37:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:00,858 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-30 10:37:00,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:00,992 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-30 10:37:00,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:37:00,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 10:37:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:00,993 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:37:00,993 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:37:00,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:37:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:37:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:37:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-30 10:37:00,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-30 10:37:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:00,997 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-30 10:37:00,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:37:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-30 10:37:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:37:00,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:00,998 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-30 10:37:00,998 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:00,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-30 10:37:00,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:00,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:00,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:01,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:01,387 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 [2018-09-30 10:37:01,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:01,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:37:01,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:01,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:01,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:37:01,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:37:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:37:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:01,451 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-30 10:37:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:01,509 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-30 10:37:01,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:37:01,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 10:37:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:01,510 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:37:01,510 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:37:01,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:37:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:37:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:37:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-30 10:37:01,515 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-30 10:37:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:01,515 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-30 10:37:01,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:37:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-30 10:37:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:37:01,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:01,516 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-30 10:37:01,516 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:01,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:01,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-30 10:37:01,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:01,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:01,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:01,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:01,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:01,910 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:01,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:01,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:01,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:01,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:37:01,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:37:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:37:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:01,981 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-30 10:37:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:02,453 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-30 10:37:02,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:37:02,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-30 10:37:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:02,454 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:37:02,454 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:37:02,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:37:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:37:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-30 10:37:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:37:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-30 10:37:02,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-30 10:37:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-30 10:37:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:37:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-30 10:37:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:37:02,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:02,459 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 10:37:02,459 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:02,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-30 10:37:02,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:02,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:02,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:02,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:02,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:03,086 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 [2018-09-30 10:37:03,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:03,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-30 10:37:03,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:03,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:03,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:37:03,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:37:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:37:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:03,170 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-30 10:37:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:03,306 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-30 10:37:03,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:37:03,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 10:37:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:03,307 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:37:03,307 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:37:03,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:37:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:37:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:37:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-30 10:37:03,311 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-30 10:37:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:03,312 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-30 10:37:03,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:37:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-30 10:37:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:37:03,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:03,312 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-30 10:37:03,312 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:03,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-30 10:37:03,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:03,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:03,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:03,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:03,571 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 [2018-09-30 10:37:03,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:03,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-30 10:37:03,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:03,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:03,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:03,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:37:03,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:37:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:37:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:03,639 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-30 10:37:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:03,701 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-30 10:37:03,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:37:03,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 10:37:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:03,702 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:37:03,702 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:37:03,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:37:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:37:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:37:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-30 10:37:03,706 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-30 10:37:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:03,706 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-30 10:37:03,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:37:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-30 10:37:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:37:03,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:03,707 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-30 10:37:03,707 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:03,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-30 10:37:03,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:03,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:03,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:03,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:04,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:04,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:04,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:04,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:04,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:04,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:37:04,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:37:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:37:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:04,093 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-30 10:37:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:04,800 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-30 10:37:04,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:37:04,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-30 10:37:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:04,801 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:37:04,802 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:37:04,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:37:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:37:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-30 10:37:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:37:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 10:37:04,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-30 10:37:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:04,807 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 10:37:04,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:37:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 10:37:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:37:04,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:04,807 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 10:37:04,808 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:04,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:04,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-30 10:37:04,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:04,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:04,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:04,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:04,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:05,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:05,381 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 [2018-09-30 10:37:05,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:05,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:05,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:05,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:05,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:05,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:37:05,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:37:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:37:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:05,449 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-30 10:37:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:05,591 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-30 10:37:05,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:37:05,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 10:37:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:05,593 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:37:05,593 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:37:05,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:37:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:37:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:37:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-30 10:37:05,597 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-30 10:37:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:05,597 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-30 10:37:05,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:37:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-30 10:37:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:37:05,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:05,598 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-30 10:37:05,598 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:05,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-30 10:37:05,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:05,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:05,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:05,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:05,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:05,916 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 [2018-09-30 10:37:05,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:05,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 10:37:05,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:05,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:05,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:05,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:37:05,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:37:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:37:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:05,986 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-30 10:37:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:06,048 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-30 10:37:06,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:37:06,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 10:37:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:06,049 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:37:06,049 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:37:06,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:37:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:37:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:37:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-30 10:37:06,054 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-30 10:37:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:06,055 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-30 10:37:06,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:37:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-30 10:37:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:37:06,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:06,055 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-30 10:37:06,056 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:06,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-30 10:37:06,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:06,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:06,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:06,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:06,449 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 [2018-09-30 10:37:06,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:06,491 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:06,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:06,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:06,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:37:06,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:37:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:37:06,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:06,543 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-30 10:37:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:07,133 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-30 10:37:07,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:37:07,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-30 10:37:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:07,134 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:37:07,134 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:37:07,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:37:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:37:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-30 10:37:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:37:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-30 10:37:07,139 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-30 10:37:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:07,140 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-30 10:37:07,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:37:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-30 10:37:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:37:07,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:07,140 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 10:37:07,141 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:07,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-30 10:37:07,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:07,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:07,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:07,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:07,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:07,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:07,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:07,523 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:37:07,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:07,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:07,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:07,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:37:07,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:37:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:37:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:07,566 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-30 10:37:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:07,775 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-30 10:37:07,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:37:07,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 10:37:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:07,776 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:37:07,777 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:37:07,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:37:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:37:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:37:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-30 10:37:07,781 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-30 10:37:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:07,781 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-30 10:37:07,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:37:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-30 10:37:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:37:07,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:07,782 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-30 10:37:07,782 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:07,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-30 10:37:07,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:07,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:07,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:07,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:08,132 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 [2018-09-30 10:37:08,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:08,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-30 10:37:08,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:08,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:08,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:37:08,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:37:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:37:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:08,208 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-30 10:37:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:08,276 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-30 10:37:08,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:37:08,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 10:37:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:08,277 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:37:08,278 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:37:08,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:37:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:37:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:37:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-30 10:37:08,282 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-30 10:37:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:08,282 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-30 10:37:08,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:37:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-30 10:37:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:37:08,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:08,283 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-30 10:37:08,283 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:08,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-30 10:37:08,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:08,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:08,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:08,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:08,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:08,654 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 [2018-09-30 10:37:08,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:08,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:08,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:08,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:37:08,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:37:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:37:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:08,723 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-30 10:37:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:09,405 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-30 10:37:09,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:37:09,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-30 10:37:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:09,405 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:37:09,406 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:37:09,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:37:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:37:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-30 10:37:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:37:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 10:37:09,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-30 10:37:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:09,409 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 10:37:09,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:37:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 10:37:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:37:09,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:09,410 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 10:37:09,410 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:09,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:09,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-30 10:37:09,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:09,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:09,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:09,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:09,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:09,771 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 [2018-09-30 10:37:09,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:09,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:09,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:09,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:09,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:09,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:37:09,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:37:09,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:37:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:09,844 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-30 10:37:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:09,967 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-30 10:37:09,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:37:09,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 10:37:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:09,968 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:37:09,968 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:37:09,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:37:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:37:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:37:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-30 10:37:09,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-30 10:37:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:09,973 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-30 10:37:09,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:37:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-30 10:37:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:37:09,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:09,973 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-30 10:37:09,974 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:09,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-30 10:37:09,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:09,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:09,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:09,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:10,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:10,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:10,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:10,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:37:10,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:10,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:10,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:10,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:37:10,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:37:10,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:37:10,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:10,734 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-30 10:37:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:10,804 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-30 10:37:10,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:37:10,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 10:37:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:10,806 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:37:10,806 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:37:10,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:37:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:37:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:37:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-30 10:37:10,811 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-30 10:37:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:10,811 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-30 10:37:10,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:37:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-30 10:37:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:37:10,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:10,812 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-30 10:37:10,812 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:10,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-30 10:37:10,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:10,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:10,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:10,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:10,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:11,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:11,435 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 [2018-09-30 10:37:11,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:11,469 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:11,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:11,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:11,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:11,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:37:11,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:37:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:37:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:11,502 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-30 10:37:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:12,195 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-30 10:37:12,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:37:12,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-30 10:37:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:12,196 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:37:12,197 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:37:12,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:37:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:37:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-30 10:37:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:37:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 10:37:12,202 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-30 10:37:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:12,202 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 10:37:12,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:37:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 10:37:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:37:12,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:12,203 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 10:37:12,203 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:12,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-30 10:37:12,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:12,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:12,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:12,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:12,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:12,545 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 [2018-09-30 10:37:12,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:12,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:37:12,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:12,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:12,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:12,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:37:12,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:37:12,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:37:12,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:12,643 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 10:37:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:12,793 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-30 10:37:12,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:37:12,793 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 10:37:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:12,794 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:37:12,794 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:37:12,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:37:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:37:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:37:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-30 10:37:12,798 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-30 10:37:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-30 10:37:12,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:37:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-30 10:37:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:37:12,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:12,799 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-30 10:37:12,799 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:12,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:12,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-30 10:37:12,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:12,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:12,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:12,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:13,065 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 [2018-09-30 10:37:13,077 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:13,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:37:13,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:13,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:13,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:37:13,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:37:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:37:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:13,147 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-30 10:37:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:13,286 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-30 10:37:13,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:37:13,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 10:37:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:13,287 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:37:13,287 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:37:13,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:37:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:37:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:37:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-30 10:37:13,292 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-30 10:37:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:13,292 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-30 10:37:13,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:37:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-30 10:37:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:37:13,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:13,292 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-30 10:37:13,293 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:13,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-30 10:37:13,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:13,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:13,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:13,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:13,698 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 [2018-09-30 10:37:13,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:13,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:13,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:13,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:37:13,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:37:13,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:37:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:13,770 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-30 10:37:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:14,662 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-30 10:37:14,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:37:14,662 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 10:37:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:14,663 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:37:14,663 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:37:14,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:37:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:37:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-30 10:37:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:37:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-30 10:37:14,666 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-30 10:37:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:14,666 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-30 10:37:14,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:37:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-30 10:37:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:37:14,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:14,667 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 10:37:14,667 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:14,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-30 10:37:14,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:14,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:14,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:14,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:14,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:14,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:14,951 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 [2018-09-30 10:37:14,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:14,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:14,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:14,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:15,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:37:15,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:37:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:37:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:15,031 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-30 10:37:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:15,298 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-30 10:37:15,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:37:15,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 10:37:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:15,299 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:37:15,299 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:37:15,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:37:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:37:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:37:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-30 10:37:15,303 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-30 10:37:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:15,304 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-30 10:37:15,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:37:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-30 10:37:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:37:15,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:15,304 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-30 10:37:15,304 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:15,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-30 10:37:15,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:15,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:15,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:15,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:15,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:15,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:15,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-30 10:37:15,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:15,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:15,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:37:15,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:37:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:37:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:15,853 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-30 10:37:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:15,932 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-30 10:37:15,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:37:15,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 10:37:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:15,935 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:37:15,935 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:37:15,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:37:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:37:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:37:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-30 10:37:15,940 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-30 10:37:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:15,940 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-30 10:37:15,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:37:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-30 10:37:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:37:15,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:15,941 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-30 10:37:15,941 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:15,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-30 10:37:15,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:15,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:15,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:16,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:16,386 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 [2018-09-30 10:37:16,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:16,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:16,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:16,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:16,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:16,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:37:16,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:37:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:37:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:16,508 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-30 10:37:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:17,462 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-30 10:37:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:37:17,462 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-30 10:37:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:17,463 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:37:17,463 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:37:17,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:37:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:37:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-30 10:37:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:37:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 10:37:17,468 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-30 10:37:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:17,468 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 10:37:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:37:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 10:37:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:37:17,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:17,469 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 10:37:17,469 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:17,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-30 10:37:17,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:17,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:17,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:17,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:17,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:17,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:17,979 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 [2018-09-30 10:37:17,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:18,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 10:37:18,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:18,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:18,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:18,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:37:18,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:37:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:37:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:18,059 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-30 10:37:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:18,287 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-30 10:37:18,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:37:18,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 10:37:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:18,288 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:37:18,288 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:37:18,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:37:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:37:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:37:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-30 10:37:18,293 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-30 10:37:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:18,293 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-30 10:37:18,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:37:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-30 10:37:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:37:18,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:18,294 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-30 10:37:18,295 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:18,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-30 10:37:18,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:18,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:18,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:18,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:18,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:19,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:19,848 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 [2018-09-30 10:37:19,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:19,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 10:37:19,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:19,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:19,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:19,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:37:19,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:37:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:37:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:19,937 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-30 10:37:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:20,132 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-30 10:37:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:37:20,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 10:37:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:20,133 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:37:20,133 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:37:20,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:37:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:37:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:37:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-30 10:37:20,138 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-30 10:37:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:20,138 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-30 10:37:20,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:37:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-30 10:37:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:37:20,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:20,138 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-30 10:37:20,138 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:20,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-30 10:37:20,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:20,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:20,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:20,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:20,551 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 [2018-09-30 10:37:20,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:20,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:20,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:20,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:37:20,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:37:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:37:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:20,629 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-30 10:37:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:21,490 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-30 10:37:21,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:37:21,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-30 10:37:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:21,492 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:37:21,492 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:37:21,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:37:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:37:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-30 10:37:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:37:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-30 10:37:21,498 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-30 10:37:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:21,498 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-30 10:37:21,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:37:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-30 10:37:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:37:21,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:21,499 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 10:37:21,499 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:21,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-30 10:37:21,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:21,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:21,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:21,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:21,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:21,818 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 [2018-09-30 10:37:21,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:21,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:21,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:21,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:21,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:21,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:37:21,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:37:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:37:21,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:21,894 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-30 10:37:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:22,139 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-30 10:37:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:37:22,140 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 10:37:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:22,140 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:37:22,141 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:37:22,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:37:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:37:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:37:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-30 10:37:22,145 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-30 10:37:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:22,145 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-30 10:37:22,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:37:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-30 10:37:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:37:22,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:22,146 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-30 10:37:22,146 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:22,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-30 10:37:22,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:22,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:22,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:22,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:22,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:22,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:22,594 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 [2018-09-30 10:37:22,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:22,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-30 10:37:22,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:22,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:22,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:22,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:37:22,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:37:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:37:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:22,686 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-30 10:37:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:23,945 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-30 10:37:23,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:37:23,946 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 10:37:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:23,946 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:37:23,946 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:37:23,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:37:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:37:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:37:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-30 10:37:23,950 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-30 10:37:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:23,950 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-30 10:37:23,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:37:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-30 10:37:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:37:23,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:23,951 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-30 10:37:23,951 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:23,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-30 10:37:23,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:23,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:23,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:24,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:24,433 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 [2018-09-30 10:37:24,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:24,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:24,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:24,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:24,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:24,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:37:24,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:37:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:37:24,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:24,582 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-30 10:37:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:25,657 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-30 10:37:25,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:37:25,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-30 10:37:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:25,658 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:37:25,658 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:37:25,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:37:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:37:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-30 10:37:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:37:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-30 10:37:25,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-30 10:37:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:25,664 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-30 10:37:25,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:37:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-30 10:37:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:37:25,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:25,665 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 10:37:25,665 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:25,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:25,665 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-30 10:37:25,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:25,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:25,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:25,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:25,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:26,161 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 [2018-09-30 10:37:26,168 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:26,210 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-30 10:37:26,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:26,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:26,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:37:26,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:37:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:37:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:26,244 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-30 10:37:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:26,476 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-30 10:37:26,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:37:26,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 10:37:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:26,477 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:37:26,477 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:37:26,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:37:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:37:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:37:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-30 10:37:26,483 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-30 10:37:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:26,483 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-30 10:37:26,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:37:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-30 10:37:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:37:26,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:26,484 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-30 10:37:26,484 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:26,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-30 10:37:26,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:26,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:26,873 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 [2018-09-30 10:37:26,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:26,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-30 10:37:26,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:26,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:26,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:37:26,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:37:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:37:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:26,967 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-30 10:37:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:27,081 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-30 10:37:27,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:37:27,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 10:37:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:27,082 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:37:27,082 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:37:27,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:37:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:37:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:37:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-30 10:37:27,087 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-30 10:37:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:27,087 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-30 10:37:27,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:37:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-30 10:37:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:37:27,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:27,088 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-30 10:37:27,088 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:27,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-30 10:37:27,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:27,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:27,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:27,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:27,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:28,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:28,251 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 [2018-09-30 10:37:28,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:28,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:28,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:28,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:37:28,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:37:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:37:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:28,335 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-30 10:37:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:29,368 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-30 10:37:29,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:37:29,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-30 10:37:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:29,369 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:37:29,369 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:37:29,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:37:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:37:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-30 10:37:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:37:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-30 10:37:29,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-30 10:37:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:29,374 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-30 10:37:29,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:37:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-30 10:37:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:37:29,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:29,375 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 10:37:29,375 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:29,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-30 10:37:29,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:29,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:29,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:29,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:29,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:29,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:29,693 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 [2018-09-30 10:37:29,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:29,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:29,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:29,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:29,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:29,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:37:29,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:37:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:37:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:29,769 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-30 10:37:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:30,146 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-30 10:37:30,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:37:30,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 10:37:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:30,147 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:37:30,148 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:37:30,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:37:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:37:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:37:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-30 10:37:30,153 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-30 10:37:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:30,153 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-30 10:37:30,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:37:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-30 10:37:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:37:30,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:30,154 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-30 10:37:30,154 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:30,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-30 10:37:30,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:30,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:30,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:30,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:30,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:30,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:30,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:30,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:30,942 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:37:30,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:30,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:30,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:30,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:37:30,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:37:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:37:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:30,991 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-30 10:37:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:31,124 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-30 10:37:31,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:37:31,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 10:37:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:31,125 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:37:31,125 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:37:31,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:37:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:37:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:37:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-30 10:37:31,131 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-30 10:37:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:31,131 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-30 10:37:31,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:37:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-30 10:37:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:37:31,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:31,132 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-30 10:37:31,132 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:31,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-30 10:37:31,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:31,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:31,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:31,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:31,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:31,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:31,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:31,650 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:31,692 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:31,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:31,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:31,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:31,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:37:31,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:37:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:37:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:31,764 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-30 10:37:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:32,843 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-30 10:37:32,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:37:32,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-30 10:37:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:32,844 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:37:32,845 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:37:32,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:37:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:37:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-30 10:37:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:37:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-30 10:37:32,851 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-30 10:37:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:32,851 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-30 10:37:32,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:37:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-30 10:37:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:37:32,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:32,852 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 10:37:32,852 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:32,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-30 10:37:32,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:32,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:32,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:32,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:32,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:33,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:33,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:33,883 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:33,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:37:33,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:33,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:33,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:33,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:37:33,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:37:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:37:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:33,978 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-30 10:37:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:34,404 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-30 10:37:34,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:37:34,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 10:37:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:34,406 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:37:34,406 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:37:34,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:37:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:37:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:37:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-30 10:37:34,410 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-30 10:37:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:34,411 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-30 10:37:34,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:37:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-30 10:37:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:37:34,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:34,412 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-30 10:37:34,412 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:34,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-30 10:37:34,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:34,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:34,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:34,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:34,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:35,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:35,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:35,217 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:35,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:37:35,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:35,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:35,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:35,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:37:35,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:37:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:37:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:35,291 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-30 10:37:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:35,418 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-30 10:37:35,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:37:35,418 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 10:37:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:35,419 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:37:35,419 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:37:35,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:37:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:37:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:37:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-30 10:37:35,424 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-30 10:37:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:35,424 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-30 10:37:35,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:37:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-30 10:37:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:37:35,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:35,424 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-30 10:37:35,424 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:35,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:35,425 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-30 10:37:35,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:35,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:35,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:35,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:35,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:35,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:35,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:35,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:36,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:36,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:36,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:37:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:37:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:37:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:36,088 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-30 10:37:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:37,229 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-30 10:37:37,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:37:37,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-30 10:37:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:37,231 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:37:37,231 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:37:37,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:37:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:37:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-30 10:37:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:37:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 10:37:37,237 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-30 10:37:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:37,237 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 10:37:37,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:37:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 10:37:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:37:37,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:37,238 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 10:37:37,238 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:37,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-30 10:37:37,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:37,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:37,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:37,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:37,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:37,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:37,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:37,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:37,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:37,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:37,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:37,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:37,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:37:37,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:37:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:37:37,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:37,992 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-30 10:37:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:38,310 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-30 10:37:38,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:37:38,311 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 10:37:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:38,312 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:37:38,312 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:37:38,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:37:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:37:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:37:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-30 10:37:38,317 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-30 10:37:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:38,317 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-30 10:37:38,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:37:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-30 10:37:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:37:38,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:38,318 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-30 10:37:38,318 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:38,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-30 10:37:38,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:38,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:38,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:38,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:38,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:38,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:38,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:38,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:37:38,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:38,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:38,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:38,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:37:38,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:37:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:37:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:38,786 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-30 10:37:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:38,876 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-30 10:37:38,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:37:38,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 10:37:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:38,877 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:37:38,877 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:37:38,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:37:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:37:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:37:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-30 10:37:38,883 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-30 10:37:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:38,883 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-30 10:37:38,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:37:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-30 10:37:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:37:38,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:38,883 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-30 10:37:38,884 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:38,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-30 10:37:38,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:38,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:38,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:38,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:39,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:39,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:39,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:39,601 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:39,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:39,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:39,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:39,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:37:39,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:37:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:37:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:39,641 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-30 10:37:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:41,006 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-30 10:37:41,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:37:41,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-30 10:37:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:41,007 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:37:41,008 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:37:41,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:37:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:37:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-30 10:37:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:37:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-30 10:37:41,012 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-30 10:37:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:41,013 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-30 10:37:41,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:37:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-30 10:37:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:37:41,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:41,013 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 10:37:41,013 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:41,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-30 10:37:41,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:41,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:41,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:41,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:41,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:41,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:41,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:41,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:41,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-30 10:37:41,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:41,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:41,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:41,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:37:41,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:37:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:37:41,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:41,522 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-30 10:37:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:41,945 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-30 10:37:41,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:37:41,946 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 10:37:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:41,946 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:37:41,946 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:37:41,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:37:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:37:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:37:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-30 10:37:41,951 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-30 10:37:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:41,952 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-30 10:37:41,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:37:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-30 10:37:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:37:41,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:41,952 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-30 10:37:41,952 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:41,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-30 10:37:41,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:41,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:41,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:41,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:41,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:42,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:42,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:42,420 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:42,513 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-30 10:37:42,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:42,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:42,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:42,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:37:42,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:37:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:37:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:42,549 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-30 10:37:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:42,685 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-30 10:37:42,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:37:42,686 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 10:37:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:42,687 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:37:42,687 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:37:42,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:37:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:37:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:37:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-30 10:37:42,693 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-30 10:37:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:42,693 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-30 10:37:42,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:37:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-30 10:37:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:37:42,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:42,694 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-30 10:37:42,694 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:42,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-30 10:37:42,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:42,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:42,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:42,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:42,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:43,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:43,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:43,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:43,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:43,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:43,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:37:43,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:37:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:37:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:43,429 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-30 10:37:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:44,814 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-30 10:37:44,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:37:44,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-30 10:37:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:44,815 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:37:44,815 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:37:44,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:37:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:37:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-30 10:37:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:37:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 10:37:44,820 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-30 10:37:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:44,820 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 10:37:44,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:37:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 10:37:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:37:44,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:44,821 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 10:37:44,821 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:44,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:44,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-30 10:37:44,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:44,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:44,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:45,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:45,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:45,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:45,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:45,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:45,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:45,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:45,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:37:45,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:37:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:37:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:45,595 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-30 10:37:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:46,681 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-30 10:37:46,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:37:46,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 10:37:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:46,682 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:37:46,683 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:37:46,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:37:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:37:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:37:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-30 10:37:46,688 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-30 10:37:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:46,689 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-30 10:37:46,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:37:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-30 10:37:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:37:46,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:46,690 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-30 10:37:46,690 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:46,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-30 10:37:46,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:46,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:46,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:46,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:46,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:47,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:47,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:47,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:47,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 10:37:47,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:47,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:47,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:47,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:37:47,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:37:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:37:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:47,409 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-30 10:37:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:47,565 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-30 10:37:47,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:37:47,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 10:37:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:47,567 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:37:47,567 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:37:47,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:37:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:37:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:37:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-30 10:37:47,572 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-30 10:37:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:47,572 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-30 10:37:47,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:37:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-30 10:37:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:37:47,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:47,573 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-30 10:37:47,573 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:47,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-30 10:37:47,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:47,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:47,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:47,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:47,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:48,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:48,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:48,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:48,394 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:48,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:48,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:48,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:48,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:37:48,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:37:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:37:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:48,451 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-30 10:37:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:49,984 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-30 10:37:49,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:37:49,984 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-30 10:37:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:49,985 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:37:49,985 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:37:49,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:37:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:37:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-30 10:37:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:37:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-30 10:37:49,991 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-30 10:37:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:49,992 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-30 10:37:49,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:37:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-30 10:37:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:37:49,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:49,992 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 10:37:49,992 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:49,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-30 10:37:49,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:49,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:49,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:49,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:50,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:50,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:50,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:50,753 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:37:50,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:50,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:50,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:50,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:37:50,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:37:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:37:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:50,793 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-30 10:37:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:51,118 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-30 10:37:51,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:37:51,118 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 10:37:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:51,119 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:37:51,119 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:37:51,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:37:51,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:37:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:37:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-30 10:37:51,124 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-30 10:37:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:51,124 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-30 10:37:51,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:37:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-30 10:37:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:37:51,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:51,125 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-30 10:37:51,125 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:51,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-30 10:37:51,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:51,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:51,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:51,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:51,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:51,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:51,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:51,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:51,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-30 10:37:51,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:51,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:51,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:51,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:37:51,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:37:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:37:51,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:51,684 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-30 10:37:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:51,815 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-30 10:37:51,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:37:51,816 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 10:37:51,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:51,817 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:37:51,817 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:37:51,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:51,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:37:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:37:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:37:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-30 10:37:51,825 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-30 10:37:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:51,825 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-30 10:37:51,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:37:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-30 10:37:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:37:51,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:51,826 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-30 10:37:51,826 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:51,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-30 10:37:51,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:51,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:51,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:51,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:51,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:52,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:52,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:52,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:52,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:52,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:52,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:37:52,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:37:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:37:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:52,583 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-30 10:37:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:54,012 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-30 10:37:54,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:37:54,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-30 10:37:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:54,013 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:37:54,013 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:37:54,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:37:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:37:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-30 10:37:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:37:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-30 10:37:54,018 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-30 10:37:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:54,019 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-30 10:37:54,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:37:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-30 10:37:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:37:54,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:54,019 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 10:37:54,020 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:54,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-30 10:37:54,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:54,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:54,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:54,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:54,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:54,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:54,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:54,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:54,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:54,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:54,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:54,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:37:54,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:37:54,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:37:54,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:54,598 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-30 10:37:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:54,898 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-30 10:37:54,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:37:54,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 10:37:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:54,899 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:37:54,899 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:37:54,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:37:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:37:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:37:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-30 10:37:54,904 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-30 10:37:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:54,904 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-30 10:37:54,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:37:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-30 10:37:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:37:54,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:54,905 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-30 10:37:54,905 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:54,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-30 10:37:54,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:54,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:54,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:54,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:54,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:55,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:55,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:55,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:55,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:37:55,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:55,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:55,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:55,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:37:55,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:37:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:37:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:55,779 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-30 10:37:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:55,902 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-30 10:37:55,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:37:55,902 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 10:37:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:55,903 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:37:55,903 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:37:55,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:37:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:37:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:37:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-30 10:37:55,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-30 10:37:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:55,909 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-30 10:37:55,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:37:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-30 10:37:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:37:55,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:55,910 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-30 10:37:55,910 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:55,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-30 10:37:55,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:55,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:55,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:55,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:55,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:56,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:56,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:56,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:56,726 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:56,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:56,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:56,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:56,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:37:56,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:37:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:37:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:56,773 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-30 10:37:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:58,346 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-30 10:37:58,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:37:58,346 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-30 10:37:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:58,347 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:37:58,347 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:37:58,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:37:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:37:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-30 10:37:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:37:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 10:37:58,352 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-30 10:37:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:58,353 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 10:37:58,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:37:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 10:37:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:37:58,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:58,353 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 10:37:58,353 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:58,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-30 10:37:58,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:58,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:58,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:58,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:59,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:59,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:59,251 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:59,307 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:37:59,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:59,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:59,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:59,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:37:59,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:37:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:37:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:37:59,356 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-30 10:37:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:59,839 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-30 10:37:59,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:37:59,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 10:37:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:59,840 INFO L225 Difference]: With dead ends: 114 [2018-09-30 10:37:59,840 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:37:59,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:37:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:37:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:37:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:37:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-30 10:37:59,846 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-30 10:37:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:59,847 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-30 10:37:59,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:37:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-30 10:37:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:37:59,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:59,848 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-30 10:37:59,848 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:59,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:59,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-30 10:37:59,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:59,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:59,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:59,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:59,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:00,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:00,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:00,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:00,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:38:00,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:00,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:00,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:00,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:38:00,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:38:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:38:00,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:38:00,471 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-30 10:38:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:00,652 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-30 10:38:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:38:00,652 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 10:38:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:00,653 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:38:00,653 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:38:00,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:38:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:38:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:38:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:38:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-30 10:38:00,659 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-30 10:38:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:00,660 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-30 10:38:00,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:38:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-30 10:38:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:38:00,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:00,660 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-30 10:38:00,661 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:00,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-30 10:38:00,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:00,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:00,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:01,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:01,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:01,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:01,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:01,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:01,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:38:01,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:38:01,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:38:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:38:01,817 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-30 10:38:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:03,454 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-30 10:38:03,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:38:03,455 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-30 10:38:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:03,456 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:38:03,457 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:38:03,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:38:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:38:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-30 10:38:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:38:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-30 10:38:03,462 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-30 10:38:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:03,463 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-30 10:38:03,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:38:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-30 10:38:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:38:03,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:03,463 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 10:38:03,463 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:03,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-30 10:38:03,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:03,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:03,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:03,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:03,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:04,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:04,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:04,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:04,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:04,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:04,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:04,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:04,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:38:04,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:38:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:38:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:04,134 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-30 10:38:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:04,447 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-30 10:38:04,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:38:04,447 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 10:38:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:04,448 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:38:04,448 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:38:04,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:38:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:38:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:38:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-30 10:38:04,454 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-30 10:38:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:04,454 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-30 10:38:04,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:38:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-30 10:38:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:38:04,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:04,454 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-30 10:38:04,454 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:04,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-30 10:38:04,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:04,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:04,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:04,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:04,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:04,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:05,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-30 10:38:05,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:05,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:05,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:05,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:38:05,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:38:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:38:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:05,112 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-30 10:38:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:05,229 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-30 10:38:05,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:38:05,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 10:38:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:05,230 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:38:05,230 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:38:05,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:38:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:38:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:38:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-30 10:38:05,235 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-30 10:38:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:05,236 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-30 10:38:05,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:38:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-30 10:38:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:38:05,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:05,236 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-30 10:38:05,236 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:05,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-30 10:38:05,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:05,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:05,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:05,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:05,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:06,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:06,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:06,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:38:06,097 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:38:06,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:06,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:06,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:06,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:38:06,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:38:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:38:06,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:06,138 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-30 10:38:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:07,837 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-30 10:38:07,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:38:07,838 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-30 10:38:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:07,838 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:38:07,839 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:38:07,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:38:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:38:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-30 10:38:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:38:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 10:38:07,844 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-30 10:38:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:07,844 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 10:38:07,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:38:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 10:38:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:38:07,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:07,845 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 10:38:07,845 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:07,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-30 10:38:07,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:07,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:07,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:07,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:07,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:08,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:08,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:08,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:38:08,447 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-30 10:38:08,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:08,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:08,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:08,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:38:08,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:38:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:38:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:08,499 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-30 10:38:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:08,944 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-30 10:38:08,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:38:08,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 10:38:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:08,945 INFO L225 Difference]: With dead ends: 120 [2018-09-30 10:38:08,945 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:38:08,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:38:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:38:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:38:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-30 10:38:08,950 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-30 10:38:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:08,951 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-30 10:38:08,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:38:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-30 10:38:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:38:08,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:08,951 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-30 10:38:08,951 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:08,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-30 10:38:08,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:08,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:08,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:08,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:08,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:09,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:09,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:09,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:09,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 10:38:09,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:09,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:09,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:09,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:38:09,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:38:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:38:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:09,606 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-30 10:38:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:09,724 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-30 10:38:09,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:38:09,724 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 10:38:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:09,725 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:38:09,725 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:38:09,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:38:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:38:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:38:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-30 10:38:09,732 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-30 10:38:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:09,732 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-30 10:38:09,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:38:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-30 10:38:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:38:09,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:09,733 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-30 10:38:09,733 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:09,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-30 10:38:09,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:09,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:09,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:09,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:09,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:10,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:10,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:10,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:10,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:10,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:10,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:38:10,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:38:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:38:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:10,638 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-30 10:38:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:12,511 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-30 10:38:12,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:38:12,512 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-30 10:38:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:12,513 INFO L225 Difference]: With dead ends: 122 [2018-09-30 10:38:12,513 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:38:12,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:38:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:38:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-30 10:38:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:38:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-30 10:38:12,519 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-30 10:38:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:12,520 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-30 10:38:12,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:38:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-30 10:38:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:38:12,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:12,520 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 10:38:12,521 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:12,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-30 10:38:12,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:12,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:12,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:12,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:12,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:13,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:13,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:13,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:13,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:13,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:13,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:13,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:13,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:38:13,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:38:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:38:13,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:13,198 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-30 10:38:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:13,609 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-30 10:38:13,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:38:13,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 10:38:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:13,611 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:38:13,611 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:38:13,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:38:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:38:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:38:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-30 10:38:13,616 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-30 10:38:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:13,616 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-30 10:38:13,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:38:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-30 10:38:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:38:13,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:13,616 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-30 10:38:13,617 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:13,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:13,617 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-30 10:38:13,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:13,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:13,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:13,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:13,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:14,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:14,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:14,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:14,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-30 10:38:14,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:14,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:14,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:14,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:38:14,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:38:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:38:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:14,361 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-30 10:38:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:14,476 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-30 10:38:14,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:38:14,476 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 10:38:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:14,477 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:38:14,477 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:38:14,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:38:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:38:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:38:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-30 10:38:14,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-30 10:38:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-30 10:38:14,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:38:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-30 10:38:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:38:14,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:14,483 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-30 10:38:14,484 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:14,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-30 10:38:14,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:14,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:14,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:14,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:14,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:15,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:15,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:15,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:38:15,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:38:15,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:15,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:15,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:15,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:38:15,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:38:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:38:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:15,426 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-09-30 10:38:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:17,313 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-30 10:38:17,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:38:17,314 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-09-30 10:38:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:17,314 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:38:17,315 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 10:38:17,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:38:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 10:38:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-09-30 10:38:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:38:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-30 10:38:17,320 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-09-30 10:38:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:17,320 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-30 10:38:17,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:38:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-30 10:38:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:38:17,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:17,320 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-30 10:38:17,321 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:17,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-09-30 10:38:17,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:17,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:17,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:17,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:17,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:18,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:18,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:18,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:38:18,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-09-30 10:38:18,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:18,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:18,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:18,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:38:18,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:38:18,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:38:18,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:18,124 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-09-30 10:38:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:18,604 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-09-30 10:38:18,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:38:18,604 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 10:38:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:18,605 INFO L225 Difference]: With dead ends: 126 [2018-09-30 10:38:18,605 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:38:18,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:38:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:38:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:38:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-30 10:38:18,612 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-09-30 10:38:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:18,612 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-30 10:38:18,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:38:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-30 10:38:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:38:18,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:18,613 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-30 10:38:18,613 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:18,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-09-30 10:38:18,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:18,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:18,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:18,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:18,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:19,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:19,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:19,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:19,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-30 10:38:19,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:19,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:19,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:19,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:38:19,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:38:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:38:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:19,368 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-30 10:38:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:19,484 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-30 10:38:19,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:38:19,485 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 10:38:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:19,486 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:38:19,486 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:38:19,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:38:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:38:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:38:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-09-30 10:38:19,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-09-30 10:38:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:19,493 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-09-30 10:38:19,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:38:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-09-30 10:38:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:38:19,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:19,494 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-09-30 10:38:19,494 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:19,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-09-30 10:38:19,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:19,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:19,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:19,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:19,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:20,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:20,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:20,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:20,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:20,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:20,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:38:20,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:38:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:38:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:20,462 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-09-30 10:38:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:22,487 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-30 10:38:22,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:38:22,488 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-09-30 10:38:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:22,488 INFO L225 Difference]: With dead ends: 128 [2018-09-30 10:38:22,489 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:38:22,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:38:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:38:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-09-30 10:38:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:38:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 10:38:22,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-30 10:38:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:22,495 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 10:38:22,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:38:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 10:38:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:38:22,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:22,496 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-30 10:38:22,496 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:22,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-09-30 10:38:22,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:22,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:22,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:23,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:23,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:23,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:23,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:23,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:23,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:23,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:23,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:38:23,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:38:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:38:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:23,213 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-09-30 10:38:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:23,545 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-30 10:38:23,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:38:23,545 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 10:38:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:23,546 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:38:23,546 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:38:23,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:38:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:38:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:38:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-30 10:38:23,553 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-09-30 10:38:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:23,553 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-30 10:38:23,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:38:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-30 10:38:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:38:23,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:23,554 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-30 10:38:23,554 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:23,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-09-30 10:38:23,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:23,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:23,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:23,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:23,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:24,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:24,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:24,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:24,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:38:24,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:24,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:24,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:24,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:38:24,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:38:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:38:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:24,445 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-09-30 10:38:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:24,585 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-30 10:38:24,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:38:24,585 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 10:38:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:24,586 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:38:24,586 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:38:24,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:38:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:38:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:38:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-09-30 10:38:24,593 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-09-30 10:38:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:24,593 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-09-30 10:38:24,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:38:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-09-30 10:38:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:38:24,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:24,594 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-09-30 10:38:24,594 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:24,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-09-30 10:38:24,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:24,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:24,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:24,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:24,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:25,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:25,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:25,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:38:25,557 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:38:25,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:25,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:25,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:25,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:38:25,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:38:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:38:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:25,606 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-09-30 10:38:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:27,683 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-09-30 10:38:27,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:38:27,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-09-30 10:38:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:27,684 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:38:27,684 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 10:38:27,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:38:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 10:38:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-09-30 10:38:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:38:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-30 10:38:27,692 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-09-30 10:38:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:27,692 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-30 10:38:27,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:38:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-30 10:38:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:38:27,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:27,693 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-30 10:38:27,693 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:27,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-09-30 10:38:27,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:27,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:27,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:27,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:27,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:28,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:28,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:28,361 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:38:28,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:38:28,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:28,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:28,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:28,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:38:28,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:38:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:38:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:28,468 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-09-30 10:38:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:28,897 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-30 10:38:28,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:38:28,898 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 10:38:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:28,898 INFO L225 Difference]: With dead ends: 132 [2018-09-30 10:38:28,899 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:38:28,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:38:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:38:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:38:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-30 10:38:28,906 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-09-30 10:38:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:28,906 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-30 10:38:28,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:38:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-30 10:38:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:38:28,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:28,907 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-30 10:38:28,907 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:28,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-09-30 10:38:28,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:28,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:28,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:29,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:29,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:29,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:29,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:38:29,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:29,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:29,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:29,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:38:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:38:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:38:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:29,708 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-30 10:38:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:29,839 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-30 10:38:29,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:38:29,839 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 10:38:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:29,840 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:38:29,840 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:38:29,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:38:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:38:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:38:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-09-30 10:38:29,847 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-09-30 10:38:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:29,848 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-09-30 10:38:29,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:38:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-09-30 10:38:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:38:29,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:29,848 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-09-30 10:38:29,849 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:29,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-09-30 10:38:29,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:29,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:29,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:29,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:29,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:30,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:30,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:30,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:30,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:30,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:38:30,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:38:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:38:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:30,938 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-09-30 10:38:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:33,158 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-30 10:38:33,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:38:33,159 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-09-30 10:38:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:33,159 INFO L225 Difference]: With dead ends: 134 [2018-09-30 10:38:33,160 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:38:33,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:38:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:38:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-09-30 10:38:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:38:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-30 10:38:33,165 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-09-30 10:38:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:33,165 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-30 10:38:33,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:38:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-30 10:38:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:38:33,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:33,166 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-30 10:38:33,166 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:33,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-09-30 10:38:33,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:33,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:33,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:33,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:33,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:33,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:33,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:33,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:33,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:33,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:33,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:33,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:33,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:38:33,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:38:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:38:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:33,953 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-09-30 10:38:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:34,366 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-09-30 10:38:34,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:38:34,366 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 10:38:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:34,367 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:38:34,367 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:38:34,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:38:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:38:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:38:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-30 10:38:34,372 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-09-30 10:38:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:34,372 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-30 10:38:34,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:38:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-30 10:38:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:38:34,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:34,372 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-30 10:38:34,373 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:34,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-09-30 10:38:34,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:34,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:34,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:34,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:34,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:35,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:35,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:35,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:35,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:38:35,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:35,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:35,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:35,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:38:35,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:38:35,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:38:35,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:35,245 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-09-30 10:38:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:35,375 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-30 10:38:35,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:38:35,375 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 10:38:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:35,376 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:38:35,376 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:38:35,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:38:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:38:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:38:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-09-30 10:38:35,382 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-09-30 10:38:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:35,382 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-09-30 10:38:35,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:38:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-09-30 10:38:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:38:35,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:35,383 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-09-30 10:38:35,383 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:35,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-09-30 10:38:35,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:35,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:35,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:35,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:35,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:36,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:36,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:36,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:38:36,433 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:38:36,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:36,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:36,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:36,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:38:36,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:38:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:38:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:36,476 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-09-30 10:38:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:38,785 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-30 10:38:38,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:38:38,786 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-09-30 10:38:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:38,786 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:38:38,787 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 10:38:38,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:38:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 10:38:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-09-30 10:38:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:38:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-30 10:38:38,792 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-30 10:38:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:38,793 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-30 10:38:38,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:38:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-30 10:38:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:38:38,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:38,793 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-30 10:38:38,794 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:38,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-09-30 10:38:38,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:38,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:38,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:38,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:38,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:39,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:39,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:39,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:38:39,566 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-30 10:38:39,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:39,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:39,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:39,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:38:39,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:38:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:38:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:39,606 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-09-30 10:38:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:40,193 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-30 10:38:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:38:40,194 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 10:38:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:40,195 INFO L225 Difference]: With dead ends: 138 [2018-09-30 10:38:40,195 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:38:40,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:38:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:38:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:38:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-30 10:38:40,201 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-09-30 10:38:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:40,202 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-30 10:38:40,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:38:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-30 10:38:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:38:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:40,202 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-30 10:38:40,203 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:40,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-09-30 10:38:40,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:40,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:40,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:40,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:40,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:41,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-30 10:38:41,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:41,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:41,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:41,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:38:41,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:38:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:38:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:41,069 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-30 10:38:41,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:41,211 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-30 10:38:41,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:38:41,211 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 10:38:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:41,212 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:38:41,212 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:38:41,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:38:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:38:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:38:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-09-30 10:38:41,219 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-09-30 10:38:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:41,219 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-09-30 10:38:41,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:38:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-09-30 10:38:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:38:41,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:41,219 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-09-30 10:38:41,220 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:41,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-09-30 10:38:41,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:41,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:41,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:41,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:41,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:42,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:42,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:42,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:42,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:42,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:42,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:38:42,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:38:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:38:42,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:42,408 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-09-30 10:38:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:44,818 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-30 10:38:44,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:38:44,819 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-09-30 10:38:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:44,819 INFO L225 Difference]: With dead ends: 140 [2018-09-30 10:38:44,819 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:38:44,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:38:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:38:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-09-30 10:38:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:38:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 10:38:44,825 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-09-30 10:38:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:44,825 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 10:38:44,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:38:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 10:38:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:38:44,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:44,826 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-30 10:38:44,826 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:44,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-09-30 10:38:44,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:44,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:44,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:45,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:45,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:45,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:45,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:45,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:45,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:45,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:38:45,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:38:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:38:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:45,663 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-09-30 10:38:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:46,269 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-09-30 10:38:46,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:38:46,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 10:38:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:46,270 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:38:46,270 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:38:46,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:38:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:38:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:38:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-30 10:38:46,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-09-30 10:38:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:46,277 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-30 10:38:46,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:38:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-30 10:38:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:38:46,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:46,277 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-30 10:38:46,277 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:46,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-09-30 10:38:46,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:46,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:46,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:46,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:46,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:47,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:47,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:47,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:47,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 10:38:47,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:47,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:47,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:47,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:38:47,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:38:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:38:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:47,203 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-09-30 10:38:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:47,333 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-30 10:38:47,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:38:47,333 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 10:38:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:47,334 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:38:47,334 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:38:47,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:38:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:38:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:38:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-09-30 10:38:47,341 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-09-30 10:38:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:47,342 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-09-30 10:38:47,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:38:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-09-30 10:38:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:38:47,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:47,342 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-09-30 10:38:47,343 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:47,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-09-30 10:38:47,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:47,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:47,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:47,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:47,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:48,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:48,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:48,556 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:38:48,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:38:48,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:48,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:48,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:48,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:38:48,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:38:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:38:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:48,651 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-09-30 10:38:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:51,180 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-09-30 10:38:51,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:38:51,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-09-30 10:38:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:51,181 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:38:51,181 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 10:38:51,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:38:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 10:38:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-09-30 10:38:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:38:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-30 10:38:51,190 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-09-30 10:38:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:51,190 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-30 10:38:51,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:38:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-30 10:38:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:38:51,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:51,191 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-30 10:38:51,191 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:51,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-09-30 10:38:51,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:51,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:51,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:51,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:51,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:51,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:51,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:52,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:38:52,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:38:52,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:52,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:52,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:52,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:38:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:38:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:38:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:52,110 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-09-30 10:38:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:52,518 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-09-30 10:38:52,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:38:52,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 10:38:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:52,519 INFO L225 Difference]: With dead ends: 144 [2018-09-30 10:38:52,519 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:38:52,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:38:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:38:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:38:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-30 10:38:52,526 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-09-30 10:38:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:52,526 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-30 10:38:52,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:38:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-30 10:38:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:38:52,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:52,527 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-30 10:38:52,527 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:52,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-09-30 10:38:52,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:52,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:52,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:52,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:52,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:53,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:53,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:53,357 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:38:53,424 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 10:38:53,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:53,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:53,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:53,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:38:53,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:38:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:38:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:53,464 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-30 10:38:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:53,601 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-30 10:38:53,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:38:53,602 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 10:38:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:53,602 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:38:53,602 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:38:53,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:38:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:38:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:38:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-09-30 10:38:53,609 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-09-30 10:38:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:53,609 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-09-30 10:38:53,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:38:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-09-30 10:38:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:38:53,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:53,609 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-09-30 10:38:53,609 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:53,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-09-30 10:38:53,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:53,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:53,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:53,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:54,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:54,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:54,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:54,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:54,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:54,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:38:54,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:38:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:38:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:54,804 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-09-30 10:38:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:57,416 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-30 10:38:57,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:38:57,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-09-30 10:38:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:57,418 INFO L225 Difference]: With dead ends: 146 [2018-09-30 10:38:57,418 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:38:57,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:38:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:38:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-09-30 10:38:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:38:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-09-30 10:38:57,424 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-09-30 10:38:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:57,425 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-09-30 10:38:57,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:38:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-09-30 10:38:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:38:57,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:57,425 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-30 10:38:57,425 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:57,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-09-30 10:38:57,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:57,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:57,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:38:57,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:58,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:58,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:58,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:38:58,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:38:58,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:58,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:58,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:58,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:38:58,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:38:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:38:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:38:58,317 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-09-30 10:38:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:38:58,976 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-30 10:38:58,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:38:58,977 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 10:38:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:38:58,977 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:38:58,977 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:38:58,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:38:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:38:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:38:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:38:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-30 10:38:58,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-09-30 10:38:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:38:58,983 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-30 10:38:58,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:38:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-30 10:38:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:38:58,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:38:58,984 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-30 10:38:58,984 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:38:58,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:38:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-09-30 10:38:58,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:38:58,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:38:58,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:58,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:38:58,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:38:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:38:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:59,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:38:59,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:38:59,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:38:59,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:38:59,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:38:59,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:38:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:38:59,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:38:59,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:38:59,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:38:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:38:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:38:59,933 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-09-30 10:39:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:00,093 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-30 10:39:00,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:39:00,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 10:39:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:00,094 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:39:00,094 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:39:00,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:39:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:39:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:39:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:39:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-09-30 10:39:00,100 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-09-30 10:39:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:00,100 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-09-30 10:39:00,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:39:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-09-30 10:39:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:39:00,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:00,101 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-09-30 10:39:00,101 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:00,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-09-30 10:39:00,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:00,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:00,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:00,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:00,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:01,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:01,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:01,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:39:01,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:39:01,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:01,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:01,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:01,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:39:01,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:39:01,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:39:01,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:39:01,359 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-09-30 10:39:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:04,118 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-30 10:39:04,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:39:04,119 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-09-30 10:39:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:04,119 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:39:04,119 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 10:39:04,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:39:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 10:39:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-09-30 10:39:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:39:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 10:39:04,126 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-09-30 10:39:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:04,126 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 10:39:04,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:39:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 10:39:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:39:04,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:04,127 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-30 10:39:04,127 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:04,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-09-30 10:39:04,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:04,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:04,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:04,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:04,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:04,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:04,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:04,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:39:05,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:39:05,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:05,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:05,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:05,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:39:05,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:39:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:39:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:05,088 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-09-30 10:39:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:05,815 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-09-30 10:39:05,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:39:05,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 10:39:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:05,816 INFO L225 Difference]: With dead ends: 150 [2018-09-30 10:39:05,816 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:39:05,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:39:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:39:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:39:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-30 10:39:05,823 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-09-30 10:39:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:05,824 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-30 10:39:05,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:39:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-30 10:39:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:39:05,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:05,824 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-30 10:39:05,824 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:05,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-09-30 10:39:05,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:05,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:05,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:05,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:05,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:06,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:06,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:06,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:39:06,782 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:39:06,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:06,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:06,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:06,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:39:06,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:39:06,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:39:06,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:06,823 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-30 10:39:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:06,994 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-30 10:39:06,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:39:06,994 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 10:39:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:06,995 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:39:06,995 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:39:06,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:39:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:39:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:39:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-09-30 10:39:07,002 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-09-30 10:39:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:07,002 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-09-30 10:39:07,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:39:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-09-30 10:39:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:39:07,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:07,003 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-09-30 10:39:07,003 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:07,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-09-30 10:39:07,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:07,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:07,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:07,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:07,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:08,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:08,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:08,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:08,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:08,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:08,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:39:08,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:39:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:39:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:08,303 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-09-30 10:39:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:11,130 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-30 10:39:11,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:39:11,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-09-30 10:39:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:11,131 INFO L225 Difference]: With dead ends: 152 [2018-09-30 10:39:11,131 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:39:11,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:39:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:39:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-09-30 10:39:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:39:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-09-30 10:39:11,138 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-09-30 10:39:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:11,138 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-09-30 10:39:11,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:39:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-09-30 10:39:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:39:11,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:11,139 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-30 10:39:11,139 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:11,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-09-30 10:39:11,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:11,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:11,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:11,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:11,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:11,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:11,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:11,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:39:12,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:39:12,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:12,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:12,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:12,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:39:12,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:39:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:39:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:12,099 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-09-30 10:39:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:12,824 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-09-30 10:39:12,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:39:12,825 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 10:39:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:12,825 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:39:12,825 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:39:12,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:39:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:39:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:39:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-30 10:39:12,834 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-09-30 10:39:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:12,834 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-30 10:39:12,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:39:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-30 10:39:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:39:12,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:12,835 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-30 10:39:12,835 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:12,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-09-30 10:39:12,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:12,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:12,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:12,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:12,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:13,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:13,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:13,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:39:13,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 10:39:13,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:13,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:13,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:13,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:39:13,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:39:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:39:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:13,906 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-09-30 10:39:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:14,075 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-30 10:39:14,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:39:14,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 10:39:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:14,076 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:39:14,076 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:39:14,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:39:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:39:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:39:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-09-30 10:39:14,083 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-09-30 10:39:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:14,083 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-09-30 10:39:14,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:39:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-09-30 10:39:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:39:14,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:14,083 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-09-30 10:39:14,084 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:14,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-09-30 10:39:14,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:14,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:14,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:14,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:14,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:15,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:15,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:15,338 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:39:15,403 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:39:15,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:15,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:15,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:15,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:39:15,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:39:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:39:15,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:15,455 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-09-30 10:39:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:18,458 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-09-30 10:39:18,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:39:18,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-09-30 10:39:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:18,459 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:39:18,460 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 10:39:18,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:39:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 10:39:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-09-30 10:39:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:39:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-30 10:39:18,466 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-30 10:39:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:18,467 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-30 10:39:18,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:39:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-30 10:39:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:39:18,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:18,467 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-30 10:39:18,467 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:18,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-09-30 10:39:18,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:18,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:18,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:18,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:18,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:19,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:19,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:19,400 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:39:19,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 10:39:19,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:19,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:19,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:19,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:39:19,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:39:19,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:39:19,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:19,525 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-09-30 10:39:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:20,286 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-30 10:39:20,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:39:20,287 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 10:39:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:20,287 INFO L225 Difference]: With dead ends: 156 [2018-09-30 10:39:20,288 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:39:20,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:39:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:39:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:39:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-30 10:39:20,294 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-09-30 10:39:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:20,295 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-30 10:39:20,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:39:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-30 10:39:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:39:20,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:20,295 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-30 10:39:20,295 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:20,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-09-30 10:39:20,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:20,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:20,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:20,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:20,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:21,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:21,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:21,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:39:21,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 10:39:21,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:21,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:21,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:21,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:39:21,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:39:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:39:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:21,364 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-30 10:39:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:21,521 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-30 10:39:21,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:39:21,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 10:39:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:21,522 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:39:21,522 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:39:21,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:39:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:39:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:39:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-09-30 10:39:21,529 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-09-30 10:39:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:21,529 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-09-30 10:39:21,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:39:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-09-30 10:39:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:39:21,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:21,529 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-09-30 10:39:21,530 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:21,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-09-30 10:39:21,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:21,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:21,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:21,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:21,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:22,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:22,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:22,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:22,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:22,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:22,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:39:22,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:39:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:39:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:22,936 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-09-30 10:39:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:26,014 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-30 10:39:26,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:39:26,014 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-09-30 10:39:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:26,015 INFO L225 Difference]: With dead ends: 158 [2018-09-30 10:39:26,015 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:39:26,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:39:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:39:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-09-30 10:39:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:39:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 10:39:26,022 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-09-30 10:39:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:26,022 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 10:39:26,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:39:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 10:39:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:39:26,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:26,022 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-30 10:39:26,023 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:26,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-09-30 10:39:26,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:26,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:26,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:26,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:26,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:26,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:26,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:26,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:39:27,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:39:27,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:27,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:27,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:27,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:39:27,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:39:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:39:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:27,078 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-09-30 10:39:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:27,565 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-09-30 10:39:27,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:39:27,565 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 10:39:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:27,566 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:39:27,566 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:39:27,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:39:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:39:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:39:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-30 10:39:27,573 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-09-30 10:39:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:27,573 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-30 10:39:27,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:39:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-30 10:39:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:39:27,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:27,574 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-30 10:39:27,574 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:27,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-09-30 10:39:27,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:27,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:27,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:27,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:27,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:28,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:28,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:28,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:39:28,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-30 10:39:28,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:28,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:28,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:28,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:39:28,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:39:28,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:39:28,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:28,703 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-09-30 10:39:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:28,856 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-30 10:39:28,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:39:28,857 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 10:39:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:28,858 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:39:28,858 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:39:28,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:39:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:39:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:39:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-09-30 10:39:28,864 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-09-30 10:39:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:28,865 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-09-30 10:39:28,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:39:28,865 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-09-30 10:39:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:39:28,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:28,865 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-09-30 10:39:28,865 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:28,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:28,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-09-30 10:39:28,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:28,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:28,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:28,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:28,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:30,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:30,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:30,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:39:30,280 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:39:30,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:30,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:30,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:30,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:39:30,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:39:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:39:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:30,334 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-09-30 10:39:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:33,602 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-30 10:39:33,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:39:33,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-09-30 10:39:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:33,603 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:39:33,604 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 10:39:33,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:39:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 10:39:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-09-30 10:39:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:39:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-30 10:39:33,611 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-09-30 10:39:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:33,611 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-30 10:39:33,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:39:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-30 10:39:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:39:33,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:33,612 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-30 10:39:33,612 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:33,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-09-30 10:39:33,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:33,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:33,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:33,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:33,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:34,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:34,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:34,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:39:34,683 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-09-30 10:39:34,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:34,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:34,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:34,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:39:34,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:39:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:39:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:34,726 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-09-30 10:39:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:35,607 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-09-30 10:39:35,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:39:35,607 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 10:39:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:35,608 INFO L225 Difference]: With dead ends: 162 [2018-09-30 10:39:35,608 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:39:35,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:39:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:39:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:39:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-30 10:39:35,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-09-30 10:39:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:35,617 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-30 10:39:35,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:39:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-30 10:39:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:39:35,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:35,618 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-30 10:39:35,618 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:35,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-09-30 10:39:35,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:35,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:35,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:36,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:36,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:36,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:39:36,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-30 10:39:36,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:36,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:36,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:36,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:39:36,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:39:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:39:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:36,803 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-30 10:39:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:37,000 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-30 10:39:37,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:39:37,001 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 10:39:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:37,001 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:39:37,002 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:39:37,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:39:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:39:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:39:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-09-30 10:39:37,009 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-09-30 10:39:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:37,009 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-09-30 10:39:37,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:39:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-09-30 10:39:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:39:37,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:37,010 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-09-30 10:39:37,010 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:37,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-09-30 10:39:37,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:37,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:37,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:37,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:37,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:38,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:38,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:38,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:38,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:38,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:38,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:39:38,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:39:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:39:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:38,495 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-09-30 10:39:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:41,872 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-30 10:39:41,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:39:41,872 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-09-30 10:39:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:41,873 INFO L225 Difference]: With dead ends: 164 [2018-09-30 10:39:41,873 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 10:39:41,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:39:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 10:39:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-09-30 10:39:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:39:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 10:39:41,880 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-30 10:39:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:41,880 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 10:39:41,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:39:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 10:39:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:39:41,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:41,881 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-30 10:39:41,881 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:41,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-09-30 10:39:41,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:41,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:41,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:41,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:41,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:42,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:42,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:42,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:39:42,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:39:42,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:42,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:43,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:43,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:39:43,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:39:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:39:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:43,019 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-09-30 10:39:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:43,674 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-30 10:39:43,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:39:43,674 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 10:39:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:43,675 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:39:43,675 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:39:43,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:39:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:39:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:39:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-30 10:39:43,685 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-09-30 10:39:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:43,685 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-30 10:39:43,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:39:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-30 10:39:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:39:43,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:43,686 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-30 10:39:43,686 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:43,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-09-30 10:39:43,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:43,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:43,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:43,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:43,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:44,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:44,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:44,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:39:44,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:39:44,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:44,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:44,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:44,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:39:44,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:39:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:39:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:44,908 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-09-30 10:39:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:45,101 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-30 10:39:45,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:39:45,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 10:39:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:45,102 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:39:45,102 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:39:45,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:39:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:39:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:39:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-09-30 10:39:45,110 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-09-30 10:39:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:45,110 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-09-30 10:39:45,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:39:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-09-30 10:39:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:39:45,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:45,110 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-09-30 10:39:45,111 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:45,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-09-30 10:39:45,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:45,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:45,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:45,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:45,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:46,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:46,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:46,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:39:46,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:39:46,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:46,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:46,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:46,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:39:46,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:39:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:39:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:46,657 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-09-30 10:39:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:50,164 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-09-30 10:39:50,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:39:50,164 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-09-30 10:39:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:50,165 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:39:50,165 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 10:39:50,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:39:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 10:39:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-09-30 10:39:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:39:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 10:39:50,172 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-09-30 10:39:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:50,173 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 10:39:50,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:39:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 10:39:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:39:50,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:50,173 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-30 10:39:50,173 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:50,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-09-30 10:39:50,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:50,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:50,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:51,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:51,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:51,211 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:39:51,301 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:39:51,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:51,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:51,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:51,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:39:51,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:39:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:39:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:51,357 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-09-30 10:39:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:52,251 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-09-30 10:39:52,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:39:52,251 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 10:39:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:52,252 INFO L225 Difference]: With dead ends: 168 [2018-09-30 10:39:52,252 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:39:52,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:39:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:39:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:39:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-30 10:39:52,259 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-09-30 10:39:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:52,259 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-30 10:39:52,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:39:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-30 10:39:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:39:52,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:52,260 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-30 10:39:52,260 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:52,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-09-30 10:39:52,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:52,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:52,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:52,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:52,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:53,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:53,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:53,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:39:54,056 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:39:54,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:39:54,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:54,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:54,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:39:54,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:39:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:39:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:54,101 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-30 10:39:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:54,286 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-09-30 10:39:54,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:39:54,287 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 10:39:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:54,287 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:39:54,287 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:39:54,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:39:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:39:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:39:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-09-30 10:39:54,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-09-30 10:39:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:54,295 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-09-30 10:39:54,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:39:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-09-30 10:39:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:39:54,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:54,296 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-09-30 10:39:54,296 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:54,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-09-30 10:39:54,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:54,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:54,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:54,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:39:54,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:55,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:39:55,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:39:55,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:39:55,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:39:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:39:55,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:39:55,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:39:55,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:39:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:39:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:55,869 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-09-30 10:39:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:39:59,488 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-30 10:39:59,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:39:59,488 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-09-30 10:39:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:39:59,489 INFO L225 Difference]: With dead ends: 170 [2018-09-30 10:39:59,489 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:39:59,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:39:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:39:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-09-30 10:39:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:39:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-09-30 10:39:59,498 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-09-30 10:39:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:39:59,498 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-09-30 10:39:59,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:39:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-09-30 10:39:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:39:59,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:39:59,499 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-30 10:39:59,499 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:39:59,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:39:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-09-30 10:39:59,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:39:59,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:39:59,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:59,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:39:59,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:39:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:00,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:00,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:00,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:40:00,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:40:00,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:00,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:00,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:00,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:40:00,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:40:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:40:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:00,706 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-09-30 10:40:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:01,256 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-09-30 10:40:01,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:40:01,256 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 10:40:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:01,257 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:40:01,257 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:40:01,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:40:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:40:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:40:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-30 10:40:01,264 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-09-30 10:40:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:01,264 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-30 10:40:01,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:40:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-30 10:40:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:40:01,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:01,265 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-30 10:40:01,265 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:01,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-09-30 10:40:01,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:01,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:01,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:01,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:02,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:02,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:02,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:40:02,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:40:02,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:02,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:02,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:02,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:40:02,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:40:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:40:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:02,542 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-09-30 10:40:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:02,712 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-30 10:40:02,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:40:02,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 10:40:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:02,713 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:40:02,713 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:40:02,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:40:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:40:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:40:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-09-30 10:40:02,723 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-09-30 10:40:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:02,724 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-09-30 10:40:02,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:40:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-09-30 10:40:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:40:02,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:02,724 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-09-30 10:40:02,725 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:02,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-09-30 10:40:02,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:02,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:02,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:02,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:02,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:04,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:04,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:04,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:40:04,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:40:04,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:04,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:04,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:04,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:40:04,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:40:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:40:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:04,416 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-09-30 10:40:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:08,146 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-30 10:40:08,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:40:08,147 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-09-30 10:40:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:08,147 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:40:08,148 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 10:40:08,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:40:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 10:40:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-09-30 10:40:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:40:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-30 10:40:08,155 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-09-30 10:40:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:08,155 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-30 10:40:08,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:40:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-30 10:40:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:40:08,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:08,156 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-30 10:40:08,156 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:08,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-09-30 10:40:08,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:08,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:08,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:08,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:08,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:09,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:09,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:09,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:40:09,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-09-30 10:40:09,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:09,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:09,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:09,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:40:09,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:40:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:40:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:09,404 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-09-30 10:40:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:09,790 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-30 10:40:09,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:40:09,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 10:40:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:09,791 INFO L225 Difference]: With dead ends: 174 [2018-09-30 10:40:09,791 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:40:09,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:40:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:40:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:40:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-30 10:40:09,802 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-09-30 10:40:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:09,802 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-30 10:40:09,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:40:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-30 10:40:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:40:09,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:09,803 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-30 10:40:09,803 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:09,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-09-30 10:40:09,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:09,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:09,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:09,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:11,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:11,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:11,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:40:11,094 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-30 10:40:11,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:11,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:11,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:11,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:40:11,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:40:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:40:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:11,149 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-30 10:40:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:11,336 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-09-30 10:40:11,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:40:11,336 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 10:40:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:11,337 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:40:11,337 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:40:11,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:40:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:40:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:40:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-09-30 10:40:11,345 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-09-30 10:40:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:11,345 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-09-30 10:40:11,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:40:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-09-30 10:40:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:40:11,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:11,346 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-09-30 10:40:11,346 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:11,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-09-30 10:40:11,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:11,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:11,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:11,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:11,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:12,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:12,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:12,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:40:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:13,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:13,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:13,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:40:13,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:40:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:40:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:13,056 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-09-30 10:40:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:16,947 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-30 10:40:16,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:40:16,947 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-09-30 10:40:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:16,948 INFO L225 Difference]: With dead ends: 176 [2018-09-30 10:40:16,948 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:40:16,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:40:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:40:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-09-30 10:40:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:40:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-30 10:40:16,956 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-09-30 10:40:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:16,956 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-30 10:40:16,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:40:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-30 10:40:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:40:16,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:16,957 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-30 10:40:16,957 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:16,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-09-30 10:40:16,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:16,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:16,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:16,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:40:16,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:18,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:18,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:18,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:40:18,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:40:18,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:18,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:18,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:18,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:40:18,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:40:18,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:40:18,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:18,233 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-09-30 10:40:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:18,825 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-09-30 10:40:18,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:40:18,825 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 10:40:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:18,826 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:40:18,826 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:40:18,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:40:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:40:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:40:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-30 10:40:18,837 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-09-30 10:40:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:18,837 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-30 10:40:18,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:40:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-30 10:40:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:40:18,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:18,838 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-30 10:40:18,838 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:18,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-09-30 10:40:18,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:18,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:18,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:18,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:20,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:20,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:20,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:40:20,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 10:40:20,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:20,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:20,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:20,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:40:20,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:40:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:40:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:20,227 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-09-30 10:40:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:20,421 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-30 10:40:20,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:40:20,421 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 10:40:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:20,422 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:40:20,422 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 10:40:20,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 10:40:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 10:40:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 10:40:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-09-30 10:40:20,430 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-09-30 10:40:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:20,431 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-09-30 10:40:20,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:40:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-09-30 10:40:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 10:40:20,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:20,431 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-09-30 10:40:20,431 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:20,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-09-30 10:40:20,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:20,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:20,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:20,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:20,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:22,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:22,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:22,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:40:22,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:40:22,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:22,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:22,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:22,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:40:22,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:40:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:40:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:22,185 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-09-30 10:40:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:26,204 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-09-30 10:40:26,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:40:26,204 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-09-30 10:40:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:26,205 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:40:26,205 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 10:40:26,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:40:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 10:40:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-09-30 10:40:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:40:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-30 10:40:26,213 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-09-30 10:40:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:26,213 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-30 10:40:26,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:40:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-30 10:40:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:40:26,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:26,214 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-30 10:40:26,214 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:26,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-09-30 10:40:26,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:26,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:26,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:27,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:27,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:27,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:40:27,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:40:27,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:27,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:27,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:27,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:40:27,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:40:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:40:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:40:27,566 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-09-30 10:40:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:28,087 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-30 10:40:28,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:40:28,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 10:40:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:28,088 INFO L225 Difference]: With dead ends: 180 [2018-09-30 10:40:28,089 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:40:28,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:40:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:40:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:40:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:40:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-30 10:40:28,096 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-09-30 10:40:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:28,096 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-30 10:40:28,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:40:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-30 10:40:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:40:28,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:28,097 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-30 10:40:28,097 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:28,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-09-30 10:40:28,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:28,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:28,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:28,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:28,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:29,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:29,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:29,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:40:29,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-30 10:40:29,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:40:29,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:29,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:29,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:40:29,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:40:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:40:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:40:29,505 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-30 10:40:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:40:29,700 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-09-30 10:40:29,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:40:29,701 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 10:40:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:40:29,701 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:40:29,702 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 10:40:29,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:40:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 10:40:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 10:40:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 10:40:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-09-30 10:40:29,710 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-09-30 10:40:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:40:29,711 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-09-30 10:40:29,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:40:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-09-30 10:40:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 10:40:29,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:40:29,711 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-09-30 10:40:29,712 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:40:29,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:40:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-09-30 10:40:29,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:40:29,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:40:29,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:29,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:40:29,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:40:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:31,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:40:31,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:40:31,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:40:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:40:31,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:40:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:40:31,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:40:31,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:40:31,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:40:31,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:40:31,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:40:31,561 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 60 states. Received shutdown request... [2018-09-30 10:40:32,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:40:32,433 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:40:32,438 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:40:32,438 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:40:32 BoogieIcfgContainer [2018-09-30 10:40:32,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:40:32,439 INFO L168 Benchmark]: Toolchain (without parser) took 238076.41 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.3 MB). Free memory was 1.5 GB in the beginning and 956.0 MB in the end (delta: 522.2 MB). Peak memory consumption was 299.9 MB. Max. memory is 7.1 GB. [2018-09-30 10:40:32,440 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-30 10:40:32,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.99 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. [2018-09-30 10:40:32,441 INFO L168 Benchmark]: Boogie Preprocessor took 25.53 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. [2018-09-30 10:40:32,441 INFO L168 Benchmark]: RCFGBuilder took 297.47 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. [2018-09-30 10:40:32,441 INFO L168 Benchmark]: TraceAbstraction took 237700.72 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.3 MB). Free memory was 1.5 GB in the beginning and 956.0 MB in the end (delta: 501.0 MB). Peak memory consumption was 278.7 MB. Max. memory is 7.1 GB. [2018-09-30 10:40:32,443 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 0.20 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 45.99 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 25.53 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 297.47 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 237700.72 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.3 MB). Free memory was 1.5 GB in the beginning and 956.0 MB in the end (delta: 501.0 MB). Peak memory consumption was 278.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 27 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (25 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (120states) and FLOYD_HOARE automaton (currently 27 states, 60 states before enhancement), while ReachableStatesComputation was computing reachable states (25 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 237.6s OverallTime, 172 OverallIterations, 57 TraceHistogramMax, 112.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 688 SDtfs, 1599 SDslu, 6279 SDs, 0 SdLazy, 163442 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20566 GetRequests, 15322 SyntacticMatches, 114 SemanticMatches, 5130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 101.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, 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: 0.8s AutomataMinimizationTime, 171 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 107.0s InterpolantComputationTime, 21309 NumberOfCodeBlocks, 21309 NumberOfCodeBlocksAsserted, 1643 NumberOfCheckSat, 20968 ConstructedInterpolants, 0 QuantifiedInterpolants, 7178084 SizeOfPredicates, 112 NumberOfNonLiveVariables, 46137 ConjunctsInSsa, 13503 ConjunctsInUnsatCore, 341 InterpolantComputations, 3 PerfectInterpolantSequences, 130033/383493 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-40-32-452.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-40-32-452.csv Completed graceful shutdown