java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:22:36,173 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:22:36,175 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:22:36,187 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:22:36,187 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:22:36,189 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:22:36,190 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:22:36,193 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:22:36,195 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:22:36,196 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:22:36,197 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:22:36,221 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 10:22:36,248 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:22:36,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:22:36,250 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:22:36,250 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:22:36,251 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:22:36,251 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:22:36,251 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:22:36,251 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:22:36,252 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:22:36,252 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:22:36,252 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:22:36,253 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:22:36,254 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:22:36,254 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:22:36,254 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:22:36,254 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:22:36,256 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:22:36,256 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:22:36,256 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:22:36,256 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:22:36,256 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:22:36,256 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:22:36,257 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:22:36,257 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:22:36,257 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:22:36,319 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:22:36,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:22:36,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:22:36,341 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:22:36,342 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:22:36,342 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-30 10:22:36,343 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-30 10:22:36,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:22:36,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:22:36,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:22:36,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:22:36,406 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:22:36,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:22:36,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:22:36,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:22:36,447 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:22:36,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/1) ... [2018-09-30 10:22:36,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:22:36,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:22:36,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:22:36,471 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:22:36,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (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 10:22:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:22:36,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:22:36,771 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:22:36,772 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:22:36 BoogieIcfgContainer [2018-09-30 10:22:36,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:22:36,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:22:36,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:22:36,780 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:22:36,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:22:36" (1/2) ... [2018-09-30 10:22:36,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d7302b and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:22:36, skipping insertion in model container [2018-09-30 10:22:36,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:22:36" (2/2) ... [2018-09-30 10:22:36,785 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-30 10:22:36,796 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:22:36,809 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:22:36,868 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:22:36,869 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:22:36,869 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:22:36,870 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:22:36,870 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:22:36,870 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:22:36,870 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:22:36,870 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:22:36,871 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:22:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:22:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:22:36,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:36,894 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:22:36,895 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:36,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 10:22:36,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:36,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:36,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:36,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:36,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:37,046 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 10:22:37,048 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:22:37,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:22:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:22:37,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:22:37,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:22:37,069 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:22:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:37,114 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:22:37,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:22:37,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 10:22:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:37,126 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:22:37,126 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:22:37,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:22:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:22:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:22:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:22:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:22:37,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:22:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:37,169 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:22:37,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:22:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:22:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:22:37,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:37,170 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 10:22:37,170 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:37,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 10:22:37,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:37,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:37,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:37,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:37,259 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 10:22:37,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:37,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:37,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:37,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:37,341 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 10:22:37,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:37,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:22:37,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:22:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:22:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:22:37,431 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 10:22:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:37,524 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:22:37,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:22:37,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 10:22:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:37,526 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:22:37,527 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:22:37,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 10:22:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:22:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:22:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:22:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:22:37,535 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:22:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:37,535 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:22:37,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:22:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:22:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:22:37,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:37,536 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 10:22:37,538 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:37,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 10:22:37,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:37,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:37,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:37,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:37,782 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 10:22:37,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:37,782 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) [2018-09-30 10:22:37,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:37,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:37,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:37,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:37,827 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 10:22:37,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:37,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:22:37,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:22:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:22:37,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:22:37,853 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 10:22:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:37,891 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:22:37,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:22:37,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 10:22:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:37,894 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:22:37,894 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:22:37,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:22:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:22:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:22:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:22:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:22:37,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:22:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:37,899 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:22:37,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:22:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:22:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:22:37,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:37,900 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 10:22:37,900 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:37,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 10:22:37,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:37,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:37,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:37,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:38,030 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 10:22:38,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:38,032 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) [2018-09-30 10:22:38,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:38,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:22:38,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:38,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:38,094 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 10:22:38,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:38,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:22:38,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:22:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:22:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:22:38,117 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 10:22:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:38,154 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:22:38,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:22:38,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 10:22:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:38,155 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:22:38,155 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:22:38,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:22:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:22:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:22:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:22:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:22:38,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:22:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:38,160 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:22:38,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:22:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:22:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:22:38,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:38,162 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 10:22:38,162 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:38,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 10:22:38,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:38,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:38,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:38,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:38,536 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 10:22:38,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:38,537 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 10:22:38,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:38,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:38,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:38,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:38,582 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 10:22:38,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:38,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:22:38,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:22:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:22:38,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:22:38,607 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 10:22:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:38,690 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:22:38,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:22:38,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 10:22:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:38,692 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:22:38,692 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:22:38,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:22:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:22:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:22:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:22:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:22:38,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:22:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:38,697 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:22:38,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:22:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:22:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:22:38,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:38,698 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 10:22:38,699 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:38,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 10:22:38,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:38,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:38,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:38,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:38,794 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 10:22:38,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:38,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:38,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:38,822 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:22:38,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:38,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:38,832 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 10:22:38,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:38,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:22:38,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:22:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:22:38,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:22:38,860 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 10:22:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:38,951 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:22:38,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:22:38,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 10:22:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:38,953 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:22:38,954 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:22:38,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:22:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:22:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:22:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:22:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:22:38,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:22:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:38,962 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:22:38,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:22:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:22:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:22:38,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:38,963 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 10:22:38,963 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:38,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 10:22:38,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:38,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:38,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:38,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:39,126 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 10:22:39,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:39,126 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 10:22:39,139 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:39,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:22:39,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:39,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:39,165 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 10:22:39,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:39,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:22:39,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:22:39,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:22:39,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:22:39,198 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 10:22:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:39,291 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:22:39,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:22:39,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 10:22:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:39,293 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:22:39,293 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:22:39,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:22:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:22:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:22:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:22:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:22:39,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:22:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:39,299 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:22:39,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:22:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:22:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:22:39,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:39,300 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 10:22:39,300 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:39,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 10:22:39,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:39,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:39,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:39,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:39,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:39,472 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 10:22:39,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:39,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:39,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:39,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:39,519 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 10:22:39,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:39,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:22:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:22:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:22:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:22:39,553 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 10:22:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:39,770 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:22:39,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:22:39,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 10:22:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:39,774 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:22:39,774 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:22:39,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:22:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:22:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:22:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:22:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:22:39,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 10:22:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:39,783 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:22:39,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:22:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:22:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:22:39,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:39,784 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 10:22:39,784 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:39,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 10:22:39,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:39,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:39,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:39,942 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 10:22:39,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:39,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:39,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:39,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:39,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:39,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:39,989 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 10:22:40,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:40,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:22:40,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:22:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:22:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:22:40,012 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 10:22:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:40,043 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:22:40,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:22:40,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 10:22:40,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:40,046 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:22:40,046 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:22:40,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:22:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:22:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:22:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:22:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:22:40,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 10:22:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:40,054 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:22:40,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:22:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:22:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:22:40,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:40,055 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 10:22:40,055 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:40,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 10:22:40,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:40,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:40,289 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 10:22:40,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:40,291 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 10:22:40,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:40,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 10:22:40,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:40,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:40,332 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 10:22:40,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:40,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:22:40,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:22:40,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:22:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:22:40,354 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 10:22:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:40,394 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:22:40,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:22:40,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 10:22:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:40,396 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:22:40,396 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:22:40,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 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 10:22:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:22:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:22:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:22:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:22:40,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 10:22:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:40,403 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:22:40,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:22:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:22:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:22:40,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:40,404 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 10:22:40,404 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:40,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 10:22:40,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:40,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:40,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:40,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:40,622 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 10:22:40,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:40,623 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 10:22:40,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:40,641 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:40,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:40,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:40,654 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 10:22:40,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:40,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:22:40,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:22:40,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:22:40,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:22:40,679 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 10:22:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:40,730 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:22:40,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:22:40,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 10:22:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:40,732 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:22:40,732 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:22:40,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:22:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:22:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:22:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:22:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:22:40,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 10:22:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:40,737 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:22:40,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:22:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:22:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:22:40,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:40,738 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 10:22:40,738 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:40,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 10:22:40,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:40,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:40,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:40,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:40,980 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 10:22:40,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:40,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:40,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:41,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 10:22:41,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:41,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:41,027 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 10:22:41,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:41,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:22:41,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:22:41,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:22:41,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:22:41,055 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 10:22:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:41,272 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:22:41,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:22:41,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 10:22:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:41,276 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:22:41,276 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:22:41,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 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 10:22:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:22:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:22:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:22:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:22:41,283 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 10:22:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:41,284 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:22:41,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:22:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:22:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:22:41,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:41,285 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 10:22:41,285 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:41,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 10:22:41,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:41,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:41,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:41,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:41,543 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 10:22:41,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:41,543 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 10:22:41,550 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:41,568 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:22:41,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:41,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:41,583 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 10:22:41,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:41,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:22:41,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:22:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:22:41,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:22:41,614 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 10:22:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:41,676 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:22:41,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:22:41,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 10:22:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:41,677 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:22:41,678 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:22:41,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 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 10:22:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:22:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:22:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:22:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:22:41,683 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 10:22:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:41,684 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:22:41,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:22:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:22:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:22:41,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:41,685 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 10:22:41,685 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:41,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 10:22:41,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:41,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:41,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:41,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:41,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:41,970 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 10:22:41,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:41,971 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 10:22:41,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:42,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:42,013 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 10:22:42,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:42,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:22:42,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:22:42,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:22:42,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:22:42,036 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 10:22:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:42,073 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:22:42,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:22:42,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 10:22:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:42,076 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:22:42,076 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:22:42,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:22:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:22:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:22:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:22:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:22:42,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 10:22:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:42,082 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:22:42,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:22:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:22:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:22:42,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:42,083 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 10:22:42,084 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:42,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 10:22:42,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:42,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:42,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:42,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:42,339 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 10:22:42,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:42,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:42,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:42,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:42,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:42,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:42,407 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 10:22:42,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:42,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:22:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:22:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:22:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:22:42,432 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 10:22:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:42,471 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:22:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:22:42,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 10:22:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:42,473 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:22:42,473 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:22:42,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:22:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:22:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:22:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:22:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:22:42,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 10:22:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:42,480 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:22:42,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:22:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:22:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:22:42,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:42,482 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 10:22:42,482 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:42,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 10:22:42,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:42,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:42,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:42,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:42,725 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 10:22:42,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:42,726 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 10:22:42,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:42,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 10:22:42,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:42,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:42,763 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 10:22:42,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:42,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:22:42,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:22:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:22:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:22:42,786 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 10:22:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:42,843 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:22:42,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:22:42,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 10:22:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:42,846 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:22:42,846 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:22:42,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:22:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:22:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:22:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:22:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:22:42,851 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 10:22:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:42,852 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:22:42,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:22:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:22:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:22:42,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:42,853 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 10:22:42,853 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:42,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 10:22:42,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:42,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:42,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:42,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:43,064 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 10:22:43,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:43,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:43,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:43,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:43,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:43,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:43,129 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 10:22:43,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:43,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:22:43,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:22:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:22:43,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:22:43,164 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 10:22:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:43,284 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:22:43,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:22:43,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 10:22:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:43,285 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:22:43,285 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:22:43,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 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 10:22:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:22:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:22:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:22:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:22:43,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 10:22:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:43,291 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:22:43,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:22:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:22:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:22:43,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:43,293 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 10:22:43,293 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:43,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 10:22:43,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:43,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:43,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:43,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:43,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:43,812 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 10:22:43,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:43,813 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 10:22:43,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:43,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 10:22:43,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:43,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:43,864 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 10:22:43,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:43,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:22:43,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:22:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:22:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:22:43,896 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 10:22:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:44,060 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:22:44,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:22:44,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 10:22:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:44,061 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:22:44,062 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:22:44,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:22:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:22:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:22:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:22:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:22:44,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 10:22:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:44,067 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:22:44,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:22:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:22:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:22:44,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:44,068 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 10:22:44,068 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:44,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:44,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 10:22:44,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:44,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:44,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:44,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:44,417 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 10:22:44,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:44,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:44,424 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:44,489 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:22:44,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:44,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:44,505 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 10:22:44,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:44,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:22:44,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:22:44,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:22:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:22:44,536 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 10:22:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:44,578 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:22:44,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:22:44,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 10:22:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:44,580 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:22:44,580 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:22:44,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 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 10:22:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:22:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:22:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:22:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:22:44,585 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 10:22:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:44,585 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:22:44,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:22:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:22:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:22:44,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:44,586 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 10:22:44,587 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:44,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 10:22:44,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:44,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:44,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:44,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:44,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:44,844 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 10:22:44,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:44,845 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 10:22:44,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:44,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:44,879 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 10:22:44,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:44,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:22:44,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:22:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:22:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:22:44,904 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 10:22:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:44,987 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:22:44,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:22:44,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 10:22:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:44,988 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:22:44,988 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:22:44,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 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 10:22:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:22:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:22:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:22:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:22:44,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 10:22:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:44,994 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:22:44,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:22:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:22:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:22:44,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:44,996 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 10:22:44,996 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:44,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 10:22:44,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:44,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:44,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:44,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:44,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:45,602 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 10:22:45,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:45,602 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 10:22:45,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:45,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:45,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:45,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:45,642 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 10:22:45,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:45,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:22:45,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:22:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:22:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:22:45,675 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 10:22:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:45,826 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:22:45,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:22:45,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 10:22:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:45,827 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:22:45,827 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:22:45,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:22:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:22:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:22:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:22:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:22:45,833 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 10:22:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:45,833 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:22:45,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:22:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:22:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:22:45,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:45,834 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 10:22:45,835 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:45,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 10:22:45,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:45,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:45,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:45,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:45,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:46,218 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 10:22:46,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:46,219 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 10:22:46,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:46,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 10:22:46,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:46,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:46,278 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 10:22:46,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:46,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:22:46,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:22:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:22:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:22:46,307 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 10:22:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:46,577 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:22:46,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:22:46,581 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 10:22:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:46,581 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:22:46,582 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:22:46,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 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 10:22:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:22:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:22:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:22:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:22:46,586 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 10:22:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:46,587 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:22:46,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:22:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:22:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:22:46,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:46,588 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 10:22:46,588 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:46,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 10:22:46,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:46,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:46,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:46,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:46,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:46,919 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 10:22:46,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:46,920 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 10:22:46,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:46,945 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:46,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:46,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:46,962 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 10:22:46,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:46,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:22:46,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:22:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:22:46,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:22:46,988 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 10:22:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:47,080 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:22:47,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:22:47,081 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 10:22:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:47,082 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:22:47,082 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:22:47,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:22:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:22:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:22:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:22:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:22:47,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 10:22:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:47,088 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:22:47,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:22:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:22:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:22:47,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:47,089 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 10:22:47,089 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:47,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 10:22:47,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:47,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:47,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:47,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:47,574 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 10:22:47,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:47,575 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 10:22:47,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:47,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 10:22:47,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:47,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:47,621 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 10:22:47,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:47,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:22:47,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:22:47,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:22:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:22:47,654 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 10:22:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:47,868 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:22:47,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:22:47,868 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 10:22:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:47,869 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:22:47,869 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:22:47,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:22:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:22:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:22:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:22:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:22:47,874 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 10:22:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:47,874 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:22:47,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:22:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:22:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:22:47,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:47,875 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 10:22:47,875 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:47,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 10:22:47,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:47,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:47,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:47,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:48,499 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 10:22:48,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:48,499 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 10:22:48,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:48,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:22:48,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:48,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:48,586 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 10:22:48,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:48,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:22:48,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:22:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:22:48,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:22:48,612 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 10:22:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:48,667 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:22:48,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:22:48,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 10:22:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:48,667 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:22:48,667 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:22:48,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:22:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:22:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:22:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:22:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:22:48,672 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 10:22:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:48,672 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:22:48,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:22:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:22:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:22:48,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:48,673 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 10:22:48,674 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:48,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 10:22:48,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:48,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:48,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:48,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:48,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:49,815 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 10:22:49,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:49,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:49,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:49,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:49,849 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 10:22:49,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:49,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:22:49,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:22:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:22:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:22:49,872 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 10:22:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:49,925 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:22:49,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:22:49,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 10:22:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:49,927 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:22:49,927 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:22:49,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:22:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:22:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:22:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:22:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:22:49,931 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 10:22:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:49,932 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:22:49,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:22:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:22:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:22:49,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:49,933 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 10:22:49,933 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:49,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 10:22:49,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:49,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:49,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:49,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:49,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:50,626 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 10:22:50,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:50,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:50,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:50,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:50,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:50,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:50,675 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 10:22:50,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:50,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:22:50,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:22:50,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:22:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:22:50,708 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 10:22:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:50,803 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:22:50,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:22:50,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 10:22:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:50,804 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:22:50,804 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:22:50,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:22:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:22:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:22:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:22:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:22:50,809 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 10:22:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:50,809 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:22:50,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:22:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:22:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:22:50,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:50,810 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 10:22:50,811 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:50,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 10:22:50,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:50,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:50,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:50,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:50,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:51,875 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 10:22:51,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:51,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:51,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:51,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 10:22:51,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:51,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:51,922 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 10:22:51,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:51,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:22:51,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:22:51,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:22:51,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:22:51,954 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 10:22:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:52,020 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:22:52,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:22:52,020 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 10:22:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:52,021 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:22:52,021 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:22:52,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:22:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:22:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:22:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:22:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:22:52,026 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 10:22:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:52,026 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:22:52,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:22:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:22:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:22:52,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:52,027 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 10:22:52,027 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:52,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 10:22:52,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:52,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:52,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:52,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:52,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:52,815 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 10:22:52,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:52,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:52,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:52,839 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:52,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:52,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:52,853 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 10:22:52,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:52,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:22:52,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:22:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:22:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:22:52,882 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 10:22:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:52,952 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:22:52,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:22:52,953 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 10:22:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:52,954 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:22:52,954 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:22:52,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 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 10:22:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:22:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:22:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:22:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:22:52,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 10:22:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:52,959 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:22:52,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:22:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:22:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:22:52,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:52,960 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 10:22:52,960 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:52,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 10:22:52,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:52,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:52,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:52,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:52,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:53,579 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 10:22:53,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:53,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:53,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:53,617 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 10:22:53,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:53,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:53,634 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 10:22:53,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:53,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:22:53,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:22:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:22:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:22:53,666 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 10:22:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:53,723 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:22:53,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:22:53,723 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 10:22:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:53,724 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:22:53,724 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:22:53,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:22:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:22:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:22:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:22:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:22:53,727 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 10:22:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:53,727 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:22:53,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:22:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:22:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:22:53,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:53,728 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 10:22:53,728 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:53,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 10:22:53,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:53,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:53,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:53,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:53,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:54,622 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 10:22:54,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:54,623 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 10:22:54,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:54,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:22:54,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:54,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:54,676 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 10:22:54,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:54,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:22:54,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:22:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:22:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:22:54,708 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 10:22:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:54,858 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:22:54,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:22:54,859 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 10:22:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:54,859 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:22:54,860 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:22:54,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:22:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:22:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:22:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:22:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:22:54,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 10:22:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:54,864 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:22:54,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:22:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:22:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:22:54,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:54,865 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 10:22:54,865 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:54,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:54,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 10:22:54,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:54,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:54,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:54,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:55,351 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 10:22:55,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:55,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:55,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:55,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:55,393 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 10:22:55,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:55,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:22:55,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:22:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:22:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:22:55,418 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 10:22:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:55,487 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:22:55,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:22:55,488 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 10:22:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:55,489 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:22:55,489 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:22:55,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 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 10:22:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:22:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:22:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:22:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:22:55,493 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 10:22:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:55,493 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:22:55,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:22:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:22:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:22:55,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:55,494 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 10:22:55,494 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:55,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 10:22:55,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:55,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:55,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:55,968 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 10:22:55,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:55,968 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 10:22:55,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:56,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:56,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:56,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:56,022 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 10:22:56,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:56,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:22:56,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:22:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:22:56,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:22:56,054 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 10:22:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:56,123 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:22:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:22:56,123 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 10:22:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:56,124 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:22:56,124 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:22:56,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:22:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:22:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:22:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:22:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:22:56,128 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 10:22:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:56,129 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:22:56,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:22:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:22:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:22:56,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:56,129 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 10:22:56,130 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:56,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 10:22:56,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:56,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:56,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:56,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:56,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:57,248 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 10:22:57,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:57,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:57,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:57,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 10:22:57,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:57,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:57,300 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 10:22:57,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:57,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:22:57,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:22:57,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:22:57,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:22:57,330 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 10:22:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:57,422 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:22:57,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:22:57,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 10:22:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:57,423 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:22:57,423 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:22:57,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:22:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:22:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:22:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:22:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:22:57,427 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 10:22:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:57,427 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:22:57,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:22:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:22:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:22:57,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:57,428 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 10:22:57,428 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:57,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:57,428 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 10:22:57,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:57,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:57,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:57,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:57,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:58,197 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 10:22:58,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:58,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:58,206 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:58,229 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:58,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:58,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:58,249 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 10:22:58,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:58,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:22:58,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:22:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:22:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:22:58,271 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 10:22:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:58,425 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:22:58,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:22:58,426 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 10:22:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:58,427 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:22:58,427 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:22:58,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 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 10:22:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:22:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:22:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:22:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:22:58,432 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 10:22:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:58,433 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:22:58,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:22:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:22:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:22:58,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:58,434 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 10:22:58,434 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:58,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 10:22:58,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:58,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:58,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:58,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:58,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:59,098 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 10:22:59,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:59,098 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 10:22:59,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:59,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 10:22:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:59,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:59,152 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 10:22:59,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:59,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:22:59,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:22:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:22:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:22:59,175 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 10:22:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:59,235 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:22:59,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:22:59,237 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 10:22:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:59,238 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:22:59,238 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:22:59,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:22:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:22:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:22:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:22:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:22:59,240 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 10:22:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:59,240 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:22:59,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:22:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:22:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:22:59,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:59,241 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 10:22:59,241 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:59,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 10:22:59,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:59,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:59,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:59,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:59,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:00,121 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 10:23:00,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:00,122 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 10:23:00,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:00,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:23:00,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:00,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:00,181 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 10:23:00,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:00,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:23:00,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:23:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:23:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:23:00,213 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 10:23:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:00,924 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:23:00,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:23:00,925 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 10:23:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:00,926 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:23:00,926 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:23:00,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:23:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:23:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:23:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:23:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:23:00,930 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 10:23:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:00,931 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:23:00,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:23:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:23:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:23:00,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:00,932 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 10:23:00,932 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:00,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 10:23:00,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:00,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:00,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:00,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:02,102 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 10:23:02,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:02,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:02,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:02,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:02,162 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 10:23:02,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:02,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:23:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:23:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:23:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:23:02,192 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 10:23:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:02,269 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:23:02,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:23:02,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 10:23:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:02,270 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:23:02,270 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:23:02,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:23:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:23:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:23:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:23:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:23:02,274 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 10:23:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:02,274 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:23:02,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:23:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:23:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:23:02,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:02,275 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 10:23:02,275 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:02,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 10:23:02,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:02,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:02,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:03,059 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 10:23:03,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:03,059 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 10:23:03,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:03,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:03,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:03,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:03,110 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 10:23:03,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:03,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:23:03,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:23:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:23:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:23:03,132 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 10:23:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:03,219 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:23:03,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:23:03,220 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 10:23:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:03,221 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:23:03,221 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:23:03,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:23:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:23:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:23:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:23:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:23:03,224 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 10:23:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:03,225 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:23:03,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:23:03,225 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:23:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:23:03,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:03,226 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 10:23:03,226 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:03,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 10:23:03,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:03,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:03,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:03,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:03,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:04,187 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 10:23:04,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:04,187 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 10:23:04,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:04,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 10:23:04,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:04,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:04,250 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 10:23:04,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:04,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:23:04,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:23:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:23:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:23:04,274 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 10:23:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:04,403 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:23:04,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:23:04,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 10:23:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:04,404 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:23:04,404 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:23:04,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:23:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:23:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:23:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:23:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:23:04,408 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 10:23:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:04,408 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:23:04,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:23:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:23:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:23:04,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:04,409 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 10:23:04,409 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:04,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 10:23:04,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:04,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:04,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:05,382 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 10:23:05,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:05,382 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 10:23:05,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:05,416 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:05,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:05,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:05,433 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 10:23:05,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:05,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:23:05,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:23:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:23:05,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:23:05,456 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 10:23:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:05,528 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:23:05,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:23:05,529 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 10:23:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:05,530 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:23:05,530 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:23:05,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:23:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:23:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:23:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:23:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:23:05,534 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 10:23:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:05,534 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:23:05,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:23:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:23:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:23:05,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:05,535 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 10:23:05,535 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:05,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 10:23:05,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:05,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:05,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:05,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:05,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:06,317 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 10:23:06,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:06,318 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 10:23:06,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:06,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 10:23:06,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:06,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:06,382 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 10:23:06,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:06,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:23:06,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:23:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:23:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:23:06,415 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 10:23:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:06,510 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:23:06,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:23:06,511 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 10:23:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:06,512 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:23:06,512 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:23:06,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:23:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:23:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:23:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:23:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:23:06,518 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 10:23:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:06,518 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:23:06,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:23:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:23:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:23:06,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:06,519 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 10:23:06,519 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:06,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 10:23:06,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:06,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:06,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:06,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:06,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:07,297 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 10:23:07,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:07,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:07,346 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:23:07,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:07,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:07,367 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 10:23:07,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:07,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:23:07,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:23:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:23:07,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:23:07,389 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 10:23:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:07,453 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:23:07,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:23:07,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 10:23:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:07,454 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:23:07,455 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:23:07,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 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 10:23:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:23:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:23:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:23:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:23:07,459 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 10:23:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:07,459 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:23:07,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:23:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:23:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:23:07,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:07,460 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 10:23:07,460 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:07,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 10:23:07,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:07,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:07,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:07,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:07,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:09,212 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 10:23:09,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:09,212 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 10:23:09,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:09,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:09,262 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 10:23:09,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:09,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:23:09,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:23:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:23:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:23:09,285 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 10:23:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:09,385 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:23:09,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:23:09,385 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 10:23:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:09,386 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:23:09,387 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:23:09,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:23:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:23:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:23:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:23:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:23:09,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 10:23:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:09,392 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:23:09,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:23:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:23:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:23:09,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:09,393 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 10:23:09,393 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:09,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 10:23:09,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:09,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:09,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:09,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:10,545 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 10:23:10,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:10,546 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 10:23:10,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:10,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:10,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:10,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:10,597 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 10:23:10,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:10,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:23:10,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:23:10,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:23:10,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:23:10,621 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 10:23:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:10,979 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:23:10,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:23:10,980 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 10:23:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:10,981 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:23:10,981 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:23:10,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:23:10,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:23:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:23:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:23:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:23:10,984 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 10:23:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:10,985 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:23:10,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:23:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:23:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:23:10,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:10,985 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 10:23:10,985 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:10,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 10:23:10,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:10,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:10,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:10,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:10,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:11,866 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 10:23:11,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:11,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:11,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:11,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 10:23:11,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:11,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:11,939 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 10:23:11,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:11,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:23:11,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:23:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:23:11,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:23:11,970 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 10:23:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:12,056 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:23:12,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:23:12,057 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 10:23:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:12,058 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:23:12,058 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:23:12,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:23:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:23:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:23:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:23:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:23:12,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 10:23:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:12,063 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:23:12,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:23:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:23:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:23:12,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:12,063 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 10:23:12,064 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:12,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 10:23:12,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:12,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:12,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:12,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:12,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:13,248 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 10:23:13,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:13,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:13,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:13,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:13,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:13,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:13,303 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 10:23:13,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:13,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:23:13,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:23:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:23:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:23:13,332 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 10:23:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:13,420 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:23:13,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:23:13,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 10:23:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:13,421 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:23:13,421 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:23:13,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:23:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:23:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:23:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:23:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:23:13,425 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 10:23:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:13,425 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:23:13,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:23:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:23:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:23:13,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:13,426 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 10:23:13,426 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:13,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 10:23:13,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:13,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:13,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:13,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:14,481 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 10:23:14,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:14,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:14,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:14,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 10:23:14,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:14,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:14,549 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 10:23:14,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:14,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:23:14,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:23:14,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:23:14,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:23:14,571 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 10:23:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:14,671 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:23:14,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:23:14,671 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 10:23:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:14,672 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:23:14,673 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:23:14,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:23:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:23:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:23:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:23:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:23:14,675 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 10:23:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:14,676 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:23:14,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:23:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:23:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:23:14,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:14,677 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 10:23:14,677 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:14,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 10:23:14,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:14,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:14,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:14,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:14,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:15,808 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 10:23:15,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:15,808 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 10:23:15,816 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:15,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:23:15,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:15,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:15,877 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 10:23:15,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:15,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:23:15,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:23:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:23:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:23:15,898 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 10:23:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:15,999 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:23:15,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:23:15,999 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 10:23:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:16,000 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:23:16,001 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:23:16,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:23:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:23:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:23:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:23:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:23:16,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 10:23:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:16,005 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:23:16,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:23:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:23:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:23:16,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:16,006 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 10:23:16,006 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:16,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:16,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 10:23:16,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:16,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:16,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:16,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:16,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:17,025 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 10:23:17,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:17,026 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 10:23:17,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:17,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:17,080 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 10:23:17,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:17,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:23:17,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:23:17,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:23:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:23:17,102 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 10:23:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:17,212 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:23:17,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:23:17,213 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 10:23:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:17,214 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:23:17,214 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:23:17,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:23:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:23:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:23:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:23:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:23:17,219 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 10:23:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:17,219 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:23:17,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:23:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:23:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:23:17,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:17,220 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 10:23:17,220 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:17,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 10:23:17,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:17,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:17,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:17,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:17,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:18,799 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 10:23:18,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:18,799 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 10:23:18,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:18,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:18,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:18,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:18,886 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 10:23:18,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:18,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:23:18,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:23:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:23:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:23:18,923 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 10:23:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:19,165 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:23:19,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:23:19,166 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 10:23:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:19,167 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:23:19,167 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:23:19,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:23:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:23:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:23:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:23:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:23:19,171 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 10:23:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:19,171 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:23:19,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:23:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:23:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:23:19,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:19,172 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 10:23:19,172 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:19,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 10:23:19,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:19,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:19,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:19,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:19,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:20,797 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 10:23:20,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:20,797 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 10:23:20,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:20,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 10:23:20,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:20,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:20,887 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 10:23:20,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:20,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:23:20,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:23:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:23:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:23:20,920 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 10:23:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:21,093 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:23:21,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:23:21,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 10:23:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:21,094 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:23:21,094 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:23:21,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:23:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:23:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:23:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:23:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:23:21,098 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 10:23:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:21,098 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:23:21,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:23:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:23:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:23:21,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:21,099 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 10:23:21,099 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:21,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 10:23:21,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:21,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:22,552 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 10:23:22,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:22,553 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 10:23:22,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:22,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:22,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:22,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:22,640 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 10:23:22,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:22,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:23:22,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:23:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:23:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:23:22,671 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 10:23:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:22,864 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:23:22,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:23:22,865 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 10:23:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:22,866 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:23:22,866 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:23:22,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:23:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:23:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:23:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:23:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:23:22,870 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 10:23:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:22,871 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:23:22,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:23:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:23:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:23:22,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:22,872 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 10:23:22,872 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:22,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:22,872 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 10:23:22,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:22,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:22,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:22,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:22,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:24,121 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 10:23:24,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:24,121 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 10:23:24,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:24,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 10:23:24,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:24,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:24,273 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 10:23:24,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:24,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:23:24,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:23:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:23:24,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:23:24,298 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 10:23:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:24,384 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:23:24,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:23:24,384 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 10:23:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:24,385 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:23:24,385 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:23:24,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:23:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:23:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:23:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:23:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:23:24,391 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 10:23:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:24,391 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:23:24,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:23:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:23:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:23:24,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:24,392 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 10:23:24,392 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:24,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 10:23:24,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:24,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:24,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:24,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:25,792 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 10:23:25,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:25,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:25,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:25,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:23:25,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:25,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:25,867 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 10:23:25,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:25,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:23:25,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:23:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:23:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:23:25,889 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 10:23:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:26,376 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:23:26,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:23:26,377 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 10:23:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:26,377 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:23:26,377 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:23:26,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:23:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:23:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:23:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:23:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:23:26,382 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 10:23:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:26,382 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:23:26,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:23:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:23:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:23:26,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:26,383 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 10:23:26,383 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:26,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 10:23:26,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:26,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:26,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:26,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:26,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:28,049 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 10:23:28,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:28,050 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 10:23:28,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:28,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:28,106 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 10:23:28,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:28,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:23:28,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:23:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:23:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:23:28,142 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 10:23:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:28,543 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 10:23:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:23:28,544 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 10:23:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:28,544 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:23:28,544 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:23:28,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:23:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:23:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:23:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:23:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 10:23:28,550 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 10:23:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:28,550 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 10:23:28,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:23:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 10:23:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:23:28,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:28,551 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 10:23:28,552 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:28,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 10:23:28,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:28,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:28,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:28,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:30,314 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 10:23:30,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:30,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:30,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:30,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:30,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:30,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:30,375 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 10:23:30,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:30,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:23:30,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:23:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:23:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:23:30,407 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 10:23:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:30,656 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 10:23:30,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:23:30,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 10:23:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:30,658 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:23:30,658 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:23:30,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:23:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:23:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:23:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:23:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 10:23:30,662 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 10:23:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:30,662 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 10:23:30,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:23:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 10:23:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:23:30,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:30,662 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 10:23:30,663 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:30,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 10:23:30,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:30,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:30,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:30,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:30,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:32,112 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 10:23:32,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:32,113 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 10:23:32,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:32,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 10:23:32,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:32,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:32,204 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 10:23:32,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:32,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:23:32,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:23:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:23:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:23:32,237 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 10:23:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:32,400 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 10:23:32,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:23:32,401 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 10:23:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:32,402 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:23:32,402 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:23:32,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:23:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:23:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:23:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:23:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 10:23:32,406 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 10:23:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:32,406 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 10:23:32,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:23:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 10:23:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:23:32,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:32,406 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 10:23:32,407 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:32,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 10:23:32,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:32,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:32,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:34,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:34,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:34,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:34,397 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:34,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:34,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:34,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:34,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:23:34,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:23:34,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:23:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:23:34,461 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 10:23:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:35,906 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 10:23:35,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:23:35,907 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 10:23:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:35,908 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:23:35,908 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:23:35,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:23:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:23:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:23:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:23:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 10:23:35,912 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 10:23:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:35,912 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 10:23:35,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:23:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 10:23:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:23:35,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:35,913 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 10:23:35,913 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:35,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 10:23:35,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:35,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:35,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:35,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:37,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:37,346 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 10:23:37,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:37,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 10:23:37,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:37,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:37,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:37,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:23:37,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:23:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:23:37,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:23:37,477 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 10:23:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:37,691 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 10:23:37,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:23:37,692 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 10:23:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:37,693 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:23:37,693 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:23:37,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:23:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:23:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:23:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:23:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 10:23:37,697 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 10:23:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:37,697 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 10:23:37,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:23:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 10:23:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:23:37,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:37,698 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 10:23:37,698 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:37,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 10:23:37,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:37,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:37,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:37,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:37,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:39,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:39,132 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 10:23:39,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:39,196 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 10:23:39,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:39,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:39,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:39,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:23:39,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:23:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:23:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:23:39,248 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 10:23:39,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:39,343 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 10:23:39,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:23:39,344 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 10:23:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:39,345 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:23:39,345 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:23:39,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:23:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:23:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:23:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:23:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 10:23:39,349 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 10:23:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:39,349 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 10:23:39,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:23:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 10:23:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:23:39,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:39,349 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 10:23:39,350 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:39,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 10:23:39,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:39,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:39,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:39,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:39,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:41,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:41,133 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 10:23:41,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:41,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:41,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:41,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:23:41,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:23:41,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:23:41,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:23:41,227 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 10:23:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:41,362 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 10:23:41,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:23:41,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 10:23:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:41,363 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:23:41,363 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:23:41,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:23:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:23:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:23:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:23:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 10:23:41,367 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 10:23:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:41,367 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 10:23:41,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:23:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 10:23:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:23:41,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:41,368 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 10:23:41,368 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:41,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 10:23:41,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:41,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:41,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:41,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:41,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:42,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:42,789 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 10:23:42,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:42,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:42,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:42,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:42,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:42,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:23:42,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:23:42,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:23:42,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:23:42,882 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 10:23:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:42,998 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 10:23:42,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:23:42,998 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 10:23:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:42,999 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:23:42,999 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:23:43,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:23:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:23:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:23:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:23:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 10:23:43,004 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 10:23:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:43,004 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 10:23:43,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:23:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 10:23:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:23:43,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:43,005 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 10:23:43,006 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:43,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 10:23:43,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:43,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:43,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:43,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:43,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:44,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:44,589 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 10:23:44,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:44,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 10:23:44,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:44,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:44,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:44,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:23:44,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:23:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:23:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:23:44,728 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 10:23:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:44,876 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 10:23:44,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:23:44,876 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 10:23:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:44,877 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:23:44,877 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:23:44,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:23:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:23:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:23:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:23:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 10:23:44,881 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 10:23:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:44,881 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 10:23:44,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:23:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 10:23:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:23:44,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:44,882 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 10:23:44,882 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:44,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 10:23:44,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:44,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:44,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:44,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:47,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:47,017 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 10:23:47,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:47,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:47,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:47,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:47,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:47,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:23:47,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:23:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:23:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:23:47,112 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 10:23:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:47,230 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 10:23:47,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:23:47,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 10:23:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:47,231 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:23:47,231 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:23:47,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:23:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:23:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:23:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:23:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 10:23:47,235 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 10:23:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:47,235 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 10:23:47,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:23:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 10:23:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:23:47,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:47,236 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 10:23:47,237 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:47,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 10:23:47,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:47,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:47,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:47,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:47,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:48,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:48,797 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 10:23:48,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:48,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 10:23:48,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:48,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:48,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:48,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:23:48,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:23:48,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:23:48,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:23:48,927 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 10:23:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:49,825 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 10:23:49,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:23:49,825 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 10:23:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:49,826 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:23:49,826 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:23:49,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:23:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:23:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:23:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:23:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 10:23:49,831 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 10:23:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:49,832 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 10:23:49,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:23:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 10:23:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:23:49,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:49,833 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 10:23:49,833 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:49,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:49,833 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 10:23:49,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:49,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:49,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:49,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:49,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:51,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:51,888 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 10:23:51,899 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:23:51,960 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 10:23:51,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:51,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:52,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:52,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:23:52,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:23:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:23:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:23:52,024 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 10:23:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:52,186 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 10:23:52,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:23:52,187 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 10:23:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:52,188 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:23:52,188 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:23:52,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:23:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:23:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:23:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:23:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 10:23:52,192 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 10:23:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:52,192 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 10:23:52,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:23:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 10:23:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:23:52,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:52,193 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 10:23:52,193 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:52,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 10:23:52,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:52,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:52,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:52,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:52,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:53,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:53,899 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 10:23:53,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:53,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:53,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:53,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:23:53,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:23:53,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:23:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:23:54,000 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 10:23:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:54,114 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 10:23:54,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:23:54,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 10:23:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:54,115 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:23:54,115 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:23:54,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:23:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:23:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:23:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:23:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 10:23:54,118 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 10:23:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:54,119 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 10:23:54,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:23:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 10:23:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:23:54,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:54,120 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 10:23:54,120 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:54,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 10:23:54,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:54,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:54,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:54,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:23:54,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:56,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:56,164 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 10:23:56,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:23:56,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:23:56,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:56,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:56,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:56,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:23:56,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:23:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:23:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:23:56,251 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 10:23:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:56,353 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 10:23:56,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:23:56,354 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 10:23:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:56,355 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:23:56,355 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:23:56,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:23:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:23:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:23:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:23:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 10:23:56,359 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 10:23:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:56,359 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 10:23:56,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:23:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 10:23:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 10:23:56,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:56,360 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 10:23:56,360 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:56,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 10:23:56,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:56,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:56,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:56,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:56,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:23:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:58,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:23:58,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:23:58,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:23:58,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 10:23:58,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:58,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:58,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:23:58,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:23:58,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:23:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:23:58,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:23:58,257 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 10:23:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:58,579 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 10:23:58,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:23:58,579 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 10:23:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:58,581 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:23:58,581 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:23:58,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:23:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:23:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:23:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:23:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 10:23:58,585 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 10:23:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:58,585 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 10:23:58,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:23:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 10:23:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:23:58,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:58,586 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 10:23:58,586 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:58,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 10:23:58,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:58,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:58,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:58,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:58,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:00,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:00,506 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 10:24:00,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:00,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:00,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:00,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:00,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:00,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:24:00,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:24:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:24:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:24:00,617 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 10:24:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:00,806 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 10:24:00,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:24:00,806 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 10:24:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:00,807 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:24:00,807 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:24:00,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:24:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:24:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:24:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:24:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 10:24:00,811 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 10:24:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:00,811 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 10:24:00,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:24:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 10:24:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:24:00,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:00,812 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 10:24:00,813 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:00,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 10:24:00,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:00,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:00,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:02,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:02,991 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 10:24:02,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:03,255 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 10:24:03,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:03,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:03,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:03,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:24:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:24:03,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:24:03,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:24:03,321 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 10:24:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:03,491 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 10:24:03,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:24:03,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 10:24:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:03,493 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:24:03,493 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:24:03,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:24:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:24:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:24:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:24:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 10:24:03,497 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 10:24:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:03,497 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 10:24:03,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:24:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 10:24:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:24:03,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:03,498 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 10:24:03,498 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:03,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 10:24:03,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:03,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:03,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:03,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:03,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:05,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:05,577 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 10:24:05,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:05,656 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 10:24:05,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:05,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:05,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:05,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:24:05,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:24:05,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:24:05,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:24:05,705 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 10:24:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:05,837 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 10:24:05,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:24:05,837 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 10:24:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:05,839 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:24:05,839 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 10:24:05,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:24:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 10:24:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 10:24:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 10:24:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 10:24:05,843 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 10:24:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:05,844 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 10:24:05,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:24:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 10:24:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 10:24:05,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:05,845 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 10:24:05,845 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:05,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 10:24:05,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:05,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:05,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:05,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:05,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:08,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:08,021 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 10:24:08,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:08,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:08,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:08,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:24:08,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:24:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:24:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:24:08,125 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 10:24:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:08,323 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 10:24:08,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:24:08,324 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 10:24:08,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:08,325 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:24:08,325 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 10:24:08,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:24:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 10:24:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 10:24:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 10:24:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 10:24:08,328 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 10:24:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:08,329 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 10:24:08,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:24:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 10:24:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:24:08,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:08,330 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 10:24:08,330 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:08,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 10:24:08,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:08,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:08,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:08,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:08,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:10,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:10,543 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 10:24:10,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:10,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:10,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:10,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:10,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:10,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:24:10,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:24:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:24:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:24:10,644 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 10:24:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:10,850 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 10:24:10,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:24:10,850 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 10:24:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:10,851 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:24:10,851 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:24:10,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:24:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:24:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:24:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:24:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 10:24:10,854 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 10:24:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:10,855 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 10:24:10,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:24:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 10:24:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 10:24:10,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:10,855 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 10:24:10,856 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:10,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 10:24:10,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:10,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:10,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:10,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:13,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:13,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:24:13,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:13,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 10:24:13,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:13,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:13,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:13,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:24:13,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:24:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:24:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:24:13,320 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 10:24:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:13,527 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 10:24:13,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:24:13,527 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 10:24:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:13,528 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:24:13,528 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:24:13,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:24:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:24:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:24:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:24:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 10:24:13,531 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 10:24:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:13,531 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 10:24:13,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:24:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 10:24:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 10:24:13,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:13,532 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 10:24:13,532 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:13,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 10:24:13,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:13,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:13,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:13,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:13,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:15,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:15,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:24:15,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:15,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:15,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:15,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:15,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:15,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:24:15,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:24:15,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:24:15,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:24:15,767 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 10:24:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:15,977 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 10:24:15,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:24:15,977 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 10:24:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:15,978 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:24:15,978 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 10:24:15,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:24:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 10:24:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 10:24:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 10:24:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 10:24:15,981 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 10:24:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:15,981 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 10:24:15,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:24:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 10:24:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 10:24:15,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:15,982 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 10:24:15,982 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:15,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 10:24:15,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:15,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:15,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:15,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:15,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:18,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:18,475 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 10:24:18,482 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:18,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 10:24:18,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:18,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:18,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:18,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:24:18,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:24:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:24:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:24:18,610 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 10:24:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:19,174 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 10:24:19,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:24:19,174 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 10:24:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:19,175 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:24:19,175 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 10:24:19,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:24:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 10:24:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 10:24:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 10:24:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 10:24:19,180 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 10:24:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:19,180 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 10:24:19,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:24:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 10:24:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 10:24:19,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:19,181 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 10:24:19,182 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:19,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 10:24:19,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:19,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:19,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:19,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:19,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:22,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:22,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:24:22,926 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:23,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 10:24:23,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:23,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:23,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:23,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:24:23,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:24:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:24:23,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:24:23,084 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 10:24:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:23,236 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 10:24:23,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:24:23,236 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 10:24:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:23,237 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:24:23,237 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:24:23,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:24:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:24:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:24:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:24:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 10:24:23,241 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 10:24:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:23,241 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 10:24:23,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:24:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 10:24:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 10:24:23,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:23,243 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 10:24:23,243 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:23,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 10:24:23,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:23,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:23,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:23,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:23,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:25,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:25,557 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 10:24:25,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:25,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:25,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:25,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:24:25,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:24:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:24:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:24:25,656 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 10:24:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:25,888 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 10:24:25,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:24:25,888 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 10:24:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:25,889 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:24:25,889 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 10:24:25,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:24:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 10:24:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 10:24:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 10:24:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 10:24:25,893 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 10:24:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:25,893 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 10:24:25,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:24:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 10:24:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:24:25,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:25,894 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 10:24:25,895 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:25,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 10:24:25,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:25,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:25,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:25,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:25,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:28,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:28,509 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 10:24:28,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:28,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:28,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:28,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:28,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:28,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:24:28,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:24:28,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:24:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:24:28,627 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 10:24:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:28,784 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 10:24:28,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:24:28,784 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 10:24:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:28,785 INFO L225 Difference]: With dead ends: 169 [2018-09-30 10:24:28,785 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:24:28,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:24:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:24:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 10:24:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:24:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 10:24:28,789 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 10:24:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:28,789 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 10:24:28,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:24:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 10:24:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 10:24:28,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:28,790 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 10:24:28,790 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:28,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 10:24:28,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:28,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:28,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:28,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:28,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:31,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:31,368 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 10:24:31,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:31,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 10:24:31,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:31,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:31,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:31,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:24:31,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:24:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:24:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:24:31,521 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 10:24:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:31,682 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 10:24:31,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:24:31,683 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 10:24:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:31,683 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:24:31,684 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 10:24:31,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:24:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 10:24:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 10:24:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:24:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 10:24:31,687 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 10:24:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:31,688 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 10:24:31,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:24:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 10:24:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 10:24:31,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:31,688 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 10:24:31,689 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:31,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 10:24:31,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:31,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:31,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:31,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:31,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:34,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:34,214 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 10:24:34,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:34,263 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:34,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:34,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:34,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:34,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:24:34,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:24:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:24:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:24:34,335 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 10:24:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:34,604 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 10:24:34,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:24:34,604 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 10:24:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:34,605 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:24:34,605 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:24:34,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:24:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:24:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 10:24:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 10:24:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 10:24:34,609 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 10:24:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:34,609 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 10:24:34,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:24:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 10:24:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:24:34,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:34,610 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 10:24:34,610 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:34,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 10:24:34,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:34,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:34,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:34,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:34,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:37,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:37,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:24:37,423 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:37,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 10:24:37,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:37,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:37,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:37,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:24:37,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:24:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:24:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:24:37,562 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 10:24:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:37,833 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 10:24:37,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:24:37,833 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 10:24:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:37,834 INFO L225 Difference]: With dead ends: 175 [2018-09-30 10:24:37,834 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:24:37,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:24:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:24:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:24:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:24:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 10:24:37,838 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 10:24:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:37,838 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 10:24:37,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:24:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 10:24:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 10:24:37,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:37,839 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 10:24:37,839 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:37,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 10:24:37,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:37,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:37,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:37,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:37,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:40,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:40,410 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 10:24:40,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:24:40,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 10:24:40,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:40,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:40,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:40,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:24:40,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:24:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:24:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:24:40,568 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 10:24:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:41,012 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 10:24:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:24:41,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 10:24:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:41,014 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:24:41,014 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 10:24:41,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:24:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 10:24:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 10:24:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 10:24:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 10:24:41,018 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 10:24:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:41,018 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 10:24:41,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:24:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 10:24:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 10:24:41,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:41,019 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 10:24:41,019 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:41,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 10:24:41,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:41,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:41,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:41,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:41,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:43,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:43,971 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 10:24:43,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:44,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:44,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:44,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:24:44,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:24:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:24:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:24:44,075 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 10:24:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:44,352 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 10:24:44,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:24:44,353 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 10:24:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:44,353 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:24:44,354 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 10:24:44,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:24:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 10:24:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 10:24:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 10:24:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 10:24:44,358 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 10:24:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:44,358 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 10:24:44,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:24:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 10:24:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:24:44,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:44,360 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 10:24:44,360 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:44,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:44,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 10:24:44,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:44,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:44,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:44,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:24:44,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:47,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:47,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:24:47,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:24:47,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:24:47,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:47,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:47,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:47,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:24:47,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:24:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:24:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:24:47,409 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 10:24:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:47,558 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 10:24:47,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:24:47,558 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 10:24:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:47,559 INFO L225 Difference]: With dead ends: 181 [2018-09-30 10:24:47,559 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:24:47,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:24:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:24:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 10:24:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 10:24:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 10:24:47,563 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 10:24:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:47,563 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 10:24:47,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:24:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 10:24:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 10:24:47,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:47,564 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 10:24:47,565 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:47,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 10:24:47,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:47,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:47,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:47,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:47,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:50,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:50,270 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 10:24:50,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:24:50,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 10:24:50,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:50,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:50,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:50,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:24:50,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:24:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:24:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:24:50,433 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 10:24:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:50,710 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 10:24:50,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:24:50,710 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 10:24:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:50,711 INFO L225 Difference]: With dead ends: 183 [2018-09-30 10:24:50,711 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:24:50,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:24:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:24:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:24:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:24:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 10:24:50,714 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 10:24:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:50,714 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 10:24:50,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:24:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 10:24:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 10:24:50,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:50,715 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 10:24:50,715 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:50,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 10:24:50,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:50,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:50,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:50,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:50,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:53,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:53,788 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 10:24:53,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:24:53,835 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:24:53,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:53,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:53,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:53,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:24:53,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:24:53,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:24:53,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:24:53,892 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 10:24:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:54,088 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 10:24:54,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:24:54,088 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 10:24:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:54,090 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:24:54,090 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 10:24:54,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:24:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 10:24:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 10:24:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 10:24:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 10:24:54,094 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 10:24:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:54,094 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 10:24:54,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:24:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 10:24:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:24:54,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:54,095 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 10:24:54,095 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:54,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 10:24:54,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:54,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:54,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:54,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:54,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:24:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:56,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:24:56,945 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 10:24:56,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:24:57,042 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 10:24:57,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:24:57,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:24:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:24:57,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:24:57,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:24:57,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:24:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:24:57,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:24:57,104 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 10:24:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:24:57,475 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 10:24:57,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:24:57,475 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 10:24:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:24:57,476 INFO L225 Difference]: With dead ends: 187 [2018-09-30 10:24:57,476 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 10:24:57,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:24:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 10:24:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 10:24:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:24:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 10:24:57,480 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 10:24:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:24:57,480 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 10:24:57,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:24:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 10:24:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 10:24:57,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:24:57,481 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 10:24:57,481 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:24:57,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:24:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 10:24:57,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:24:57,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:24:57,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:57,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:24:57,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:24:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:00,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:00,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:25:00,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:00,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 10:25:00,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:00,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:00,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:00,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:25:00,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:25:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:25:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:25:00,569 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 10:25:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:00,815 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 10:25:00,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:25:00,815 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 10:25:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:00,816 INFO L225 Difference]: With dead ends: 189 [2018-09-30 10:25:00,816 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:25:00,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:25:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:25:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:25:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:25:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 10:25:00,820 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 10:25:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:00,820 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 10:25:00,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:25:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 10:25:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 10:25:00,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:00,821 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 10:25:00,822 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:00,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 10:25:00,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:00,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:00,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:00,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:00,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:04,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:04,014 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 10:25:04,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:04,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:04,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:04,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:25:04,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:25:04,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:25:04,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:25:04,130 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 10:25:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:04,309 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 10:25:04,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:25:04,309 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 10:25:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:04,310 INFO L225 Difference]: With dead ends: 191 [2018-09-30 10:25:04,310 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 10:25:04,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:25:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 10:25:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 10:25:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 10:25:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 10:25:04,315 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 10:25:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:04,315 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 10:25:04,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:25:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 10:25:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:25:04,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:04,316 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 10:25:04,316 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:04,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 10:25:04,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:04,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:04,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:04,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:04,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:08,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:08,324 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 10:25:08,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:25:08,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:25:08,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:08,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:08,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:08,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:25:08,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:25:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:25:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:25:08,452 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 10:25:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:08,630 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 10:25:08,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:25:08,630 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 10:25:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:08,631 INFO L225 Difference]: With dead ends: 193 [2018-09-30 10:25:08,631 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 10:25:08,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:25:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 10:25:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 10:25:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 10:25:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 10:25:08,635 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 10:25:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:08,635 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 10:25:08,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:25:08,635 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 10:25:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 10:25:08,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:08,636 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 10:25:08,637 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:08,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 10:25:08,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:08,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:08,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:08,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:08,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:11,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:11,787 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 10:25:11,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:25:11,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 10:25:11,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:11,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:11,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:11,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:25:11,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:25:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:25:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:25:11,965 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 10:25:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:12,163 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 10:25:12,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:25:12,163 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 10:25:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:12,164 INFO L225 Difference]: With dead ends: 195 [2018-09-30 10:25:12,165 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 10:25:12,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:25:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 10:25:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 10:25:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:25:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 10:25:12,168 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 10:25:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:12,168 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 10:25:12,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:25:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 10:25:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 10:25:12,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:12,169 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 10:25:12,169 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:12,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 10:25:12,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:12,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:12,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:12,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:12,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:15,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:15,663 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 10:25:15,671 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:25:15,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:25:15,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:15,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:15,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:15,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:25:15,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:25:15,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:25:15,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:25:15,779 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 10:25:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:16,079 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 10:25:16,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:25:16,079 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 10:25:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:16,081 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:25:16,081 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:25:16,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:25:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:25:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 10:25:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 10:25:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 10:25:16,084 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 10:25:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:16,084 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 10:25:16,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:25:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 10:25:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:25:16,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:16,085 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 10:25:16,085 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:16,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 10:25:16,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:16,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:16,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:16,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:16,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:19,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:19,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:25:19,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:25:19,673 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 10:25:19,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:19,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:19,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:19,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:25:19,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:25:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:25:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:25:19,746 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 10:25:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:20,047 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 10:25:20,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:25:20,047 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 10:25:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:20,049 INFO L225 Difference]: With dead ends: 199 [2018-09-30 10:25:20,049 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 10:25:20,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:25:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 10:25:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 10:25:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 10:25:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 10:25:20,054 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 10:25:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:20,054 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 10:25:20,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:25:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 10:25:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 10:25:20,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:20,055 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 10:25:20,056 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:20,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 10:25:20,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:20,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:20,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:20,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:20,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:23,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:23,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:25:23,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:23,798 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 10:25:23,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:23,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:23,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:23,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:25:23,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:25:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:25:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:25:23,862 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 10:25:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:24,069 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 10:25:24,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:25:24,069 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 10:25:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:24,070 INFO L225 Difference]: With dead ends: 201 [2018-09-30 10:25:24,070 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 10:25:24,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:25:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 10:25:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 10:25:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 10:25:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 10:25:24,074 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 10:25:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:24,074 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 10:25:24,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:25:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 10:25:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 10:25:24,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:24,075 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 10:25:24,076 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:24,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 10:25:24,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:24,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:24,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:24,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:24,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:27,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:27,520 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 10:25:27,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:27,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:27,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:27,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:25:27,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:25:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:25:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:25:27,642 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 10:25:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:27,986 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 10:25:27,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:25:27,987 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 10:25:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:27,988 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:25:27,988 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 10:25:27,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:25:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 10:25:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 10:25:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 10:25:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 10:25:27,992 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 10:25:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:27,992 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 10:25:27,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:25:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 10:25:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:25:27,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:27,993 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 10:25:27,993 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:27,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 10:25:27,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:27,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:27,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:31,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:31,476 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 10:25:31,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:25:31,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:25:31,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:31,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:31,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:31,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:25:31,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:25:31,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:25:31,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:25:31,596 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 10:25:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:31,904 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 10:25:31,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:25:31,904 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 10:25:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:31,905 INFO L225 Difference]: With dead ends: 205 [2018-09-30 10:25:31,905 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:25:31,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:25:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:25:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:25:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:25:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 10:25:31,908 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 10:25:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:31,908 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 10:25:31,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:25:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 10:25:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 10:25:31,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:31,909 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 10:25:31,909 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:31,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 10:25:31,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:31,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:31,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:31,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:31,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:35,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:35,879 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 10:25:35,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:25:36,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 10:25:36,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:36,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:36,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:36,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:25:36,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:25:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:25:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:25:36,073 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 10:25:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:36,327 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 10:25:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:25:36,327 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 10:25:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:36,328 INFO L225 Difference]: With dead ends: 207 [2018-09-30 10:25:36,328 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 10:25:36,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:25:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 10:25:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 10:25:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 10:25:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 10:25:36,332 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 10:25:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:36,332 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 10:25:36,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:25:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 10:25:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 10:25:36,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:36,333 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 10:25:36,333 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:36,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 10:25:36,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:36,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:36,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:36,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:40,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:40,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:25:40,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:25:40,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:25:40,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:40,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:40,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:40,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:25:40,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:25:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:25:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:25:40,324 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 10:25:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:40,584 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 10:25:40,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:25:40,584 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 10:25:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:40,585 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:25:40,585 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 10:25:40,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:25:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 10:25:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 10:25:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 10:25:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 10:25:40,590 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 10:25:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:40,590 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 10:25:40,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:25:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 10:25:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:25:40,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:40,592 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 10:25:40,592 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:40,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 10:25:40,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:40,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:40,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:40,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:40,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:44,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:44,552 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 10:25:44,561 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:25:44,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 10:25:44,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:44,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:44,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:44,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:25:44,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:25:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:25:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:25:44,888 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 10:25:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:45,133 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 10:25:45,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:25:45,134 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 10:25:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:45,135 INFO L225 Difference]: With dead ends: 211 [2018-09-30 10:25:45,135 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 10:25:45,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:25:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 10:25:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 10:25:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 10:25:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 10:25:45,138 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 10:25:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:45,138 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 10:25:45,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:25:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 10:25:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 10:25:45,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:45,139 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 10:25:45,139 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:45,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 10:25:45,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:45,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:45,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:45,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:45,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:49,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:49,301 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 10:25:49,308 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:25:49,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 10:25:49,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:49,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:49,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:49,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:25:49,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:25:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:25:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:25:49,493 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 10:25:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:49,793 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 10:25:49,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:25:49,793 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 10:25:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:49,793 INFO L225 Difference]: With dead ends: 213 [2018-09-30 10:25:49,794 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 10:25:49,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:25:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 10:25:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 10:25:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 10:25:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 10:25:49,799 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 10:25:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:49,799 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 10:25:49,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:25:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 10:25:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 10:25:49,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:49,800 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 10:25:49,801 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:49,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 10:25:49,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:49,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:49,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:49,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:49,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:53,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:53,898 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 10:25:53,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:53,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:54,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:54,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:25:54,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:25:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:25:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:25:54,024 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 10:25:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:54,431 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 10:25:54,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:25:54,431 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 10:25:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:54,432 INFO L225 Difference]: With dead ends: 215 [2018-09-30 10:25:54,432 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 10:25:54,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:25:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 10:25:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 10:25:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 10:25:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 10:25:54,436 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 10:25:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:54,436 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 10:25:54,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:25:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 10:25:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 10:25:54,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:54,438 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 10:25:54,438 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:54,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 10:25:54,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:54,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:54,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:54,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:25:54,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:25:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:58,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:25:58,378 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 10:25:58,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:25:58,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:25:58,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:25:58,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:25:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:25:58,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:25:58,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:25:58,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:25:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:25:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:25:58,522 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 10:25:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:25:58,795 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 10:25:58,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:25:58,795 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 10:25:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:25:58,796 INFO L225 Difference]: With dead ends: 217 [2018-09-30 10:25:58,796 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 10:25:58,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:25:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 10:25:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 10:25:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 10:25:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 10:25:58,801 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 10:25:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:25:58,802 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 10:25:58,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:25:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 10:25:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 10:25:58,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:25:58,803 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 10:25:58,803 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:25:58,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:25:58,803 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 10:25:58,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:25:58,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:25:58,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:58,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:25:58,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:25:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:02,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:02,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:26:02,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:26:02,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 10:26:02,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:02,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:02,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:02,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:26:02,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:26:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:26:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:26:02,954 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 10:26:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:03,307 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 10:26:03,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:26:03,307 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 10:26:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:03,308 INFO L225 Difference]: With dead ends: 219 [2018-09-30 10:26:03,308 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 10:26:03,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:26:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 10:26:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 10:26:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 10:26:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 10:26:03,313 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 10:26:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:03,313 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 10:26:03,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:26:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 10:26:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 10:26:03,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:03,314 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 10:26:03,314 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:03,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:03,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 10:26:03,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:03,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:03,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:03,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:03,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:07,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:07,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:26:07,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:26:07,711 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:26:07,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:07,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:07,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:07,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:26:07,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:26:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:26:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:26:07,795 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 10:26:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:08,102 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 10:26:08,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:26:08,102 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 10:26:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:08,103 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:26:08,103 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 10:26:08,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:26:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 10:26:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 10:26:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 10:26:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 10:26:08,106 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 10:26:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:08,107 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 10:26:08,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:26:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 10:26:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 10:26:08,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:08,107 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 10:26:08,107 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:08,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:08,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 10:26:08,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:08,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:08,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:08,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:08,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:12,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:12,407 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 10:26:12,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:26:12,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 10:26:12,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:12,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:12,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:12,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:26:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:26:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:26:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:26:12,606 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 10:26:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:12,939 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 10:26:12,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:26:12,939 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 10:26:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:12,940 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:26:12,940 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:26:12,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:26:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:26:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 10:26:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 10:26:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 10:26:12,946 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 10:26:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 10:26:12,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:26:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 10:26:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 10:26:12,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:12,947 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 10:26:12,947 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:12,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 10:26:12,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:12,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:12,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:17,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:17,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:26:17,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:26:17,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 10:26:17,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:17,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:17,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:17,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:26:17,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:26:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:26:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:26:17,697 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 10:26:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:18,177 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 10:26:18,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:26:18,177 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 10:26:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:18,178 INFO L225 Difference]: With dead ends: 225 [2018-09-30 10:26:18,178 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 10:26:18,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:26:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 10:26:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 10:26:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 10:26:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 10:26:18,181 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 10:26:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:18,181 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 10:26:18,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:26:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 10:26:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 10:26:18,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:18,183 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 10:26:18,183 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:18,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 10:26:18,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:18,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:18,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:18,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:18,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:22,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:22,726 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 10:26:22,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:22,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:22,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:22,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:26:22,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:26:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:26:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:26:22,861 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 10:26:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:23,298 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 10:26:23,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:26:23,299 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 10:26:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:23,299 INFO L225 Difference]: With dead ends: 227 [2018-09-30 10:26:23,299 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 10:26:23,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:26:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 10:26:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 10:26:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 10:26:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 10:26:23,302 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 10:26:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:23,303 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 10:26:23,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:26:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 10:26:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 10:26:23,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:23,303 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 10:26:23,304 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:23,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 10:26:23,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:23,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:23,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:23,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:26:23,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:26:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:27,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:26:27,948 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 10:26:27,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:26:28,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:26:28,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:26:28,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:26:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:26:28,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:26:28,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:26:28,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:26:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:26:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:26:28,084 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 10:26:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:26:28,558 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 10:26:28,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:26:28,559 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 10:26:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:26:28,559 INFO L225 Difference]: With dead ends: 229 [2018-09-30 10:26:28,559 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 10:26:28,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:26:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 10:26:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 10:26:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 10:26:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 10:26:28,563 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 10:26:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:26:28,563 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 10:26:28,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:26:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 10:26:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 10:26:28,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:26:28,564 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 10:26:28,564 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:26:28,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:26:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 10:26:28,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:26:28,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:26:28,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:28,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:26:28,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:26:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:26:32,310 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:26:32,314 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:26:32,315 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:26:32 BoogieIcfgContainer [2018-09-30 10:26:32,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:26:32,315 INFO L168 Benchmark]: Toolchain (without parser) took 235913.89 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 18.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 219.4 MB). Peak memory consumption was 238.2 MB. Max. memory is 7.1 GB. [2018-09-30 10:26:32,317 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 10:26:32,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.48 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 10:26:32,317 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 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 10:26:32,317 INFO L168 Benchmark]: RCFGBuilder took 303.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:26:32,318 INFO L168 Benchmark]: TraceAbstraction took 235540.33 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 18.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 198.2 MB). Peak memory consumption was 217.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:26:32,320 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 41.48 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 22.84 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 303.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235540.33 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 18.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 198.2 MB). Peak memory consumption was 217.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 227 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 100 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 235.4s OverallTime, 112 OverallIterations, 112 TraceHistogramMax, 22.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 444 SDtfs, 0 SDslu, 9989 SDs, 0 SdLazy, 10100 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18867 GetRequests, 12651 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=227occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 6.6s SatisfiabilityAnalysisTime, 195.3s InterpolantComputationTime, 25304 NumberOfCodeBlocks, 25304 NumberOfCodeBlocksAsserted, 3264 NumberOfCheckSat, 25083 ConstructedInterpolants, 0 QuantifiedInterpolants, 11189001 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25850 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/911680 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/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-26-32-328.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-26-32-328.csv Completed graceful shutdown