java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:30:31,051 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:30:31,053 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:30:31,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:30:31,065 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:30:31,066 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:30:31,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:30:31,069 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:30:31,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:30:31,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:30:31,073 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:30:31,099 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 [2018-10-04 12:30:31,114 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:30:31,115 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:30:31,116 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:30:31,116 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:30:31,117 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:30:31,117 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:30:31,117 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:30:31,117 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:30:31,118 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:30:31,118 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:30:31,118 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:30:31,118 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:30:31,118 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:30:31,119 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:30:31,119 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:30:31,119 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:30:31,119 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:30:31,119 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:30:31,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:30:31,120 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:30:31,120 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:30:31,120 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:30:31,120 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:30:31,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:30:31,121 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:30:31,121 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:30:31,121 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:30:31,122 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:30:31,122 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:30:31,122 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:30:31,167 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:30:31,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:30:31,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:30:31,193 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:30:31,194 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:30:31,195 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-10-04 12:30:31,196 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-10-04 12:30:31,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:30:31,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:30:31,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:30:31,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:30:31,249 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:30:31,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,288 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:30:31,289 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:30:31,289 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:30:31,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:30:31,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:30:31,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:30:31,293 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:30:31,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/1) ... [2018-10-04 12:30:31,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:30:31,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:30:31,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:30:31,315 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:30:31,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (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 [2018-10-04 12:30:31,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:30:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:30:31,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:30:31,529 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:30:31,530 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:30:31 BoogieIcfgContainer [2018-10-04 12:30:31,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:30:31,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:30:31,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:30:31,535 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:30:31,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:30:31" (1/2) ... [2018-10-04 12:30:31,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5243dbf9 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:30:31, skipping insertion in model container [2018-10-04 12:30:31,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:30:31" (2/2) ... [2018-10-04 12:30:31,539 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-10-04 12:30:31,549 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:30:31,556 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:30:31,608 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:30:31,609 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:30:31,609 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:30:31,610 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:30:31,610 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:30:31,610 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:30:31,610 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:30:31,610 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:30:31,611 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:30:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-04 12:30:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-04 12:30:31,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:31,634 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-04 12:30:31,635 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:31,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-04 12:30:31,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:31,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:31,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:31,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:31,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:31,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:30:31,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:30:31,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:30:31,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:30:31,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:30:31,815 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-04 12:30:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:31,873 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:30:31,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:30:31,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-04 12:30:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:31,885 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:30:31,885 INFO L226 Difference]: Without dead ends: 4 [2018-10-04 12:30:31,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:30:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-04 12:30:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-04 12:30:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-04 12:30:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-04 12:30:31,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-04 12:30:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:31,920 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-04 12:30:31,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:30:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-04 12:30:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:30:31,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:31,921 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:30:31,921 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:31,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-04 12:30:31,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:31,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:31,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:31,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:31,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:32,070 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 [2018-10-04 12:30:32,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:32,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:32,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 12:30:32,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:30:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:30:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:30:32,158 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-10-04 12:30:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:32,235 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-04 12:30:32,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:30:32,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-10-04 12:30:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:32,236 INFO L225 Difference]: With dead ends: 6 [2018-10-04 12:30:32,236 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:30:32,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:30:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:30:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:30:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:30:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:30:32,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:30:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:32,240 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:30:32,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:30:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:30:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:30:32,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:32,241 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-04 12:30:32,241 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:32,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-04 12:30:32,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:32,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:32,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:32,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:32,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:32,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:32,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:32,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:32,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:32,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:30:32,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:30:32,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:30:32,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:30:32,413 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-04 12:30:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:32,449 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-04 12:30:32,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:30:32,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:30:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:32,450 INFO L225 Difference]: With dead ends: 7 [2018-10-04 12:30:32,451 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:30:32,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:30:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:30:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:30:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:30:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:30:32,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:30:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:32,454 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:30:32,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:30:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:30:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:30:32,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:32,455 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-04 12:30:32,455 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:32,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-04 12:30:32,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:32,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:32,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:32,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:32,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:32,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:32,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:30:32,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:32,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:32,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:30:32,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:30:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:30:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:30:32,587 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-10-04 12:30:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:32,647 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 12:30:32,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:30:32,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-10-04 12:30:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:32,649 INFO L225 Difference]: With dead ends: 8 [2018-10-04 12:30:32,649 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:30:32,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:30:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:30:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:30:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:30:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:30:32,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:30:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:32,655 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:30:32,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:30:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:30:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:30:32,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:32,655 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-04 12:30:32,656 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:32,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-04 12:30:32,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:32,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:32,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:32,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:32,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:32,963 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 [2018-10-04 12:30:32,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:33,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:33,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:33,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:33,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:30:33,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:30:33,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:30:33,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:30:33,045 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-04 12:30:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:33,083 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:30:33,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:30:33,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-04 12:30:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:33,085 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:30:33,085 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:30:33,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:30:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:30:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:30:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:30:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:30:33,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:30:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:33,089 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:30:33,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:30:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:30:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:30:33,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:33,090 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-04 12:30:33,092 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:33,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-04 12:30:33,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:33,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:33,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:33,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:33,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:33,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:33,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:30:33,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:33,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:33,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:30:33,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:30:33,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:30:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:30:33,327 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-10-04 12:30:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:33,367 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:30:33,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:30:33,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-10-04 12:30:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:33,369 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:30:33,369 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:30:33,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:30:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:30:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:30:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:30:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:30:33,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:30:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:33,374 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:30:33,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:30:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:30:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:30:33,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:33,375 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-04 12:30:33,375 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:33,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-04 12:30:33,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:33,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:33,579 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 [2018-10-04 12:30:33,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:33,610 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:30:33,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:33,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:33,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:30:33,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:30:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:30:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:30:33,643 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-04 12:30:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:33,673 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:30:33,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:30:33,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-04 12:30:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:33,675 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:30:33,675 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:30:33,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:30:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:30:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:30:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:30:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:30:33,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:30:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:33,680 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:30:33,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:30:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:30:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:30:33,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:33,681 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-04 12:30:33,681 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:33,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-04 12:30:33,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:33,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:33,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:33,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:33,927 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 [2018-10-04 12:30:33,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:33,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:33,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:33,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:30:33,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:30:33,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:30:33,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:30:33,998 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-10-04 12:30:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:34,226 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:30:34,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:30:34,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-10-04 12:30:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:34,228 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:30:34,228 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:30:34,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:30:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:30:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:30:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:30:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:30:34,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:30:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:34,235 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:30:34,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:30:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:30:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:30:34,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:34,237 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-04 12:30:34,237 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:34,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-04 12:30:34,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:34,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:34,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:34,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:34,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:34,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:34,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:34,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:34,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:34,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:34,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:34,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:30:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:30:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:30:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:30:34,487 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-04 12:30:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:34,532 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:30:34,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:30:34,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-04 12:30:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:34,534 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:30:34,534 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:30:34,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:30:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:30:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:30:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:30:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:30:34,538 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:30:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:34,538 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:30:34,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:30:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:30:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:30:34,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:34,539 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-04 12:30:34,539 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:34,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-04 12:30:34,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:34,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:34,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:34,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:34,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:34,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:34,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:34,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:30:34,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:34,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:34,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:34,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:30:34,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:30:34,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:30:34,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:30:34,744 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-10-04 12:30:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:34,786 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:30:34,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:30:34,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-10-04 12:30:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:34,787 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:30:34,787 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:30:34,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:30:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:30:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:30:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:30:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:30:34,791 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:30:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:34,791 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:30:34,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:30:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:30:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:30:34,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:34,792 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-04 12:30:34,793 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:34,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-04 12:30:34,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:34,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:34,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:34,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:35,004 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 [2018-10-04 12:30:35,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:35,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:35,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:35,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:35,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:30:35,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:30:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:30:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:30:35,066 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-04 12:30:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:35,226 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:30:35,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:30:35,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-04 12:30:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:35,227 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:30:35,227 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:30:35,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:30:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:30:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:30:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:30:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:30:35,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:30:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:35,231 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:30:35,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:30:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:30:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:30:35,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:35,232 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-04 12:30:35,232 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:35,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-04 12:30:35,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:35,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:35,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:35,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:35,511 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 [2018-10-04 12:30:35,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:35,535 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:30:35,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:35,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:35,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:30:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:30:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:30:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:30:35,572 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-10-04 12:30:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:35,627 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:30:35,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:30:35,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-10-04 12:30:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:35,628 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:30:35,629 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:30:35,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:30:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:30:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:30:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:30:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:30:35,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:30:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:35,633 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:30:35,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:30:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:30:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:30:35,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:35,634 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-04 12:30:35,634 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:35,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-04 12:30:35,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:35,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:35,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:35,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:35,852 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 [2018-10-04 12:30:35,861 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:35,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:30:35,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:35,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:35,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:35,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:30:35,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:30:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:30:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:30:35,913 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-04 12:30:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:35,950 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:30:35,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:30:35,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-04 12:30:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:35,952 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:30:35,952 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:30:35,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:30:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:30:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:30:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:30:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:30:35,957 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:30:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:35,957 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:30:35,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:30:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:30:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:30:35,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:35,958 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-04 12:30:35,958 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:35,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-04 12:30:35,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:35,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:35,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:35,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:36,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:36,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:36,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:36,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:36,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:36,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:30:36,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:30:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:30:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:30:36,291 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-10-04 12:30:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:36,516 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:30:36,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:30:36,517 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-10-04 12:30:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:36,518 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:30:36,518 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:30:36,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:30:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:30:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:30:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:30:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:30:36,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:30:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:36,529 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:30:36,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:30:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:30:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:30:36,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:36,530 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-04 12:30:36,530 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:36,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-04 12:30:36,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:36,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:36,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:36,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:36,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:36,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:36,830 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 [2018-10-04 12:30:36,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:36,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:36,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:36,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:36,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:36,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:30:36,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:30:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:30:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:30:36,888 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-04 12:30:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:36,935 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:30:36,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:30:36,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-04 12:30:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:36,936 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:30:36,936 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:30:36,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:30:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:30:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:30:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:30:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:30:36,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:30:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:36,942 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:30:36,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:30:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:30:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:30:36,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:36,943 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-04 12:30:36,943 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:36,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-04 12:30:36,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:36,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:36,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:36,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:36,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:37,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:37,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:37,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:37,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:30:37,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:37,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:37,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:37,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:30:37,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:30:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:30:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:30:37,309 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-10-04 12:30:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:37,468 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:30:37,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:30:37,469 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-10-04 12:30:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:37,469 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:30:37,469 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:30:37,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:30:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:30:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:30:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:30:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:30:37,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:30:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:37,474 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:30:37,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:30:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:30:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:30:37,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:37,475 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-04 12:30:37,476 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:37,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-04 12:30:37,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:37,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:37,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:37,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:37,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:37,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:37,722 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 [2018-10-04 12:30:37,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:37,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:37,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:37,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:37,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:37,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:30:37,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:30:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:30:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:30:37,815 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-04 12:30:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:37,915 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:30:37,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:30:37,915 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-04 12:30:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:37,916 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:30:37,916 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:30:37,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:30:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:30:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:30:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:30:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:30:37,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:30:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:37,921 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:30:37,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:30:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:30:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:30:37,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:37,922 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-04 12:30:37,922 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:37,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-04 12:30:37,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:37,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:37,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:37,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:37,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:38,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:38,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:38,748 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:38,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:30:38,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:38,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:38,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:38,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:30:38,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:30:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:30:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:30:38,808 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-10-04 12:30:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:38,860 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:30:38,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:30:38,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-10-04 12:30:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:38,862 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:30:38,862 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:30:38,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:30:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:30:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:30:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:30:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:30:38,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:30:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:38,866 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:30:38,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:30:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:30:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:30:38,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:38,867 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-04 12:30:38,868 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:38,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-04 12:30:38,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:38,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:38,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:38,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:38,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:39,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:39,114 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 [2018-10-04 12:30:39,123 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:39,152 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:30:39,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:39,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:39,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:39,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:30:39,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:30:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:30:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:30:39,192 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-04 12:30:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:39,255 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:30:39,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:30:39,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-04 12:30:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:39,256 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:30:39,257 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:30:39,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:30:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:30:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:30:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:30:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:30:39,261 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:30:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:39,261 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:30:39,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:30:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:30:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:30:39,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:39,262 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-04 12:30:39,262 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:39,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-04 12:30:39,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:39,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:39,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:39,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:39,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:39,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:39,519 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 [2018-10-04 12:30:39,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:39,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:39,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:39,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:30:39,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:30:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:30:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:30:39,585 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-10-04 12:30:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:39,695 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:30:39,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:30:39,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-10-04 12:30:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:39,697 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:30:39,697 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:30:39,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:30:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:30:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:30:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:30:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:30:39,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:30:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:39,702 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:30:39,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:30:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:30:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:30:39,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:39,703 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-04 12:30:39,703 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:39,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-04 12:30:39,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:39,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:39,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:39,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:39,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:40,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:40,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:40,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:40,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:40,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:40,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:40,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:40,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:30:40,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:30:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:30:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:30:40,094 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-04 12:30:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:40,236 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:30:40,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:30:40,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-04 12:30:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:40,237 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:30:40,237 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:30:40,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:30:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:30:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:30:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:30:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:30:40,242 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:30:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:40,242 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:30:40,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:30:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:30:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:30:40,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:40,243 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-04 12:30:40,243 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:40,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-04 12:30:40,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:40,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:40,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:40,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:40,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:40,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:40,762 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 [2018-10-04 12:30:40,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:40,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:30:40,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:40,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:40,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:40,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:30:40,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:30:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:30:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:30:40,830 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-10-04 12:30:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:40,950 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:30:40,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:30:40,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-10-04 12:30:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:40,954 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:30:40,954 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:30:40,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:30:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:30:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:30:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:30:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:30:40,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:30:40,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:40,958 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:30:40,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:30:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:30:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:30:40,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:40,960 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-04 12:30:40,960 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:40,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-04 12:30:40,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:40,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:40,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:40,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:40,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:41,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:41,326 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 [2018-10-04 12:30:41,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:41,365 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:41,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:41,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:41,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:41,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:30:41,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:30:41,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:30:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:30:41,409 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-04 12:30:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:41,500 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:30:41,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:30:41,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-04 12:30:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:41,502 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:30:41,502 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:30:41,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:30:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:30:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:30:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:30:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:30:41,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:30:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:41,506 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:30:41,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:30:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:30:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:30:41,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:41,507 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-04 12:30:41,507 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:41,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-04 12:30:41,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:41,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:41,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:41,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:41,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:42,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:42,033 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 [2018-10-04 12:30:42,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:42,081 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:30:42,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:42,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:42,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:42,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:30:42,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:30:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:30:42,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:30:42,116 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-10-04 12:30:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:42,178 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:30:42,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:30:42,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-10-04 12:30:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:42,179 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:30:42,179 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:30:42,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:30:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:30:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:30:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:30:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:30:42,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:30:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:42,185 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:30:42,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:30:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:30:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:30:42,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:42,186 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-04 12:30:42,186 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:42,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-04 12:30:42,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:42,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:42,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:42,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:42,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:43,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:43,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:43,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:43,386 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:30:43,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:43,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:43,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:43,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:30:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:30:43,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:30:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:30:43,419 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-04 12:30:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:43,471 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:30:43,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:30:43,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-04 12:30:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:43,472 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:30:43,472 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:30:43,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:30:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:30:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:30:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:30:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:30:43,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:30:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:43,480 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:30:43,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:30:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:30:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:30:43,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:43,481 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-04 12:30:43,481 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:43,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-04 12:30:43,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:43,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:43,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:43,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:43,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:44,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:44,005 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 [2018-10-04 12:30:44,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:44,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:44,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:44,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:30:44,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:30:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:30:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:30:44,079 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-10-04 12:30:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:44,148 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:30:44,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:30:44,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-10-04 12:30:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:44,149 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:30:44,149 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:30:44,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:30:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:30:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:30:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:30:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:30:44,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:30:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:44,154 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:30:44,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:30:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:30:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:30:44,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:44,155 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-04 12:30:44,156 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:44,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-04 12:30:44,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:44,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:44,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:44,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:44,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:44,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:44,843 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 [2018-10-04 12:30:44,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:44,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:44,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:44,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:44,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:44,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:30:44,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:30:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:30:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:30:44,903 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-04 12:30:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:44,996 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:30:44,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:30:44,996 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-04 12:30:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:44,997 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:30:44,997 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:30:44,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:30:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:30:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:30:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:30:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:30:45,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:30:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:45,002 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:30:45,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:30:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:30:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:30:45,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:45,003 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-04 12:30:45,003 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:45,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-04 12:30:45,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:45,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:45,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:45,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:45,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:45,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:45,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:45,382 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:45,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:30:45,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:45,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:45,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:45,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:30:45,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:30:45,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:30:45,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:30:45,444 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-10-04 12:30:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:45,677 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:30:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:30:45,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-10-04 12:30:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:45,678 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:30:45,678 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:30:45,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:30:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:30:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:30:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:30:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:30:45,684 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:30:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:45,684 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:30:45,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:30:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:30:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:30:45,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:45,684 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-04 12:30:45,685 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:45,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-04 12:30:45,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:45,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:45,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:45,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:45,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:46,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:46,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:46,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:46,129 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:46,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:46,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:46,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:46,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:30:46,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:30:46,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:30:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:30:46,163 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-04 12:30:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:46,216 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:30:46,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:30:46,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-04 12:30:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:46,217 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:30:46,217 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:30:46,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:30:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:30:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:30:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:30:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:30:46,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:30:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:46,222 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:30:46,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:30:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:30:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:30:46,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:46,223 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-04 12:30:46,223 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:46,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-04 12:30:46,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:46,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:46,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:46,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:46,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:46,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:46,755 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 [2018-10-04 12:30:46,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:46,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:30:46,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:46,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:46,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:46,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:30:46,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:30:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:30:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:30:46,833 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-10-04 12:30:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:46,905 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:30:46,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:30:46,906 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-10-04 12:30:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:46,906 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:30:46,906 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:30:46,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:30:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:30:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:30:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:30:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:30:46,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:30:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:46,911 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:30:46,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:30:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:30:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:30:46,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:46,912 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-04 12:30:46,912 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:46,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-04 12:30:46,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:46,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:46,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:46,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:46,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:48,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:48,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:48,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:48,130 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:30:48,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:48,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:48,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:48,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:30:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:30:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:30:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:30:48,171 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-04 12:30:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:48,237 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:30:48,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:30:48,237 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-04 12:30:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:48,238 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:30:48,238 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:30:48,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:30:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:30:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:30:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:30:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:30:48,242 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:30:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:48,242 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:30:48,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:30:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:30:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:30:48,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:48,243 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-04 12:30:48,243 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:48,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:48,243 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-04 12:30:48,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:48,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:48,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:48,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:48,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:49,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:49,110 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 [2018-10-04 12:30:49,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:49,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:49,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:49,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:30:49,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:30:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:30:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:30:49,178 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-10-04 12:30:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:49,365 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:30:49,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:30:49,366 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-10-04 12:30:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:49,367 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:30:49,367 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:30:49,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:30:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:30:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:30:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:30:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:30:49,371 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:30:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:49,371 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:30:49,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:30:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:30:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:30:49,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:49,372 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-04 12:30:49,372 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:49,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-04 12:30:49,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:49,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:49,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:49,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:49,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:49,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:49,904 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 [2018-10-04 12:30:49,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:49,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:49,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:49,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:49,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:49,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:30:49,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:30:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:30:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:30:49,974 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-04 12:30:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:50,032 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:30:50,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:30:50,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-04 12:30:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:50,033 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:30:50,033 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:30:50,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:30:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:30:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:30:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:30:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:30:50,038 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:30:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:50,038 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:30:50,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:30:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:30:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:30:50,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:50,039 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-04 12:30:50,039 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:50,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-04 12:30:50,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:50,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:50,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:50,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:50,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:50,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:50,570 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 [2018-10-04 12:30:50,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:50,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:30:50,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:50,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:50,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:50,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:30:50,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:30:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:30:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:30:50,636 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-10-04 12:30:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:50,688 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:30:50,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:30:50,688 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-10-04 12:30:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:50,689 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:30:50,689 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:30:50,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:30:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:30:50,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:30:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:30:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:30:50,693 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:30:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:50,693 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:30:50,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:30:50,694 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:30:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:30:50,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:50,694 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-04 12:30:50,694 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:50,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-04 12:30:50,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:50,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:50,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:50,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:50,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:51,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:51,253 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 [2018-10-04 12:30:51,261 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:51,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:51,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:51,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:51,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:51,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:30:51,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:30:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:30:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:30:51,322 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-04 12:30:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:51,381 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:30:51,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:30:51,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-04 12:30:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:51,382 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:30:51,382 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:30:51,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:30:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:30:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:30:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:30:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:30:51,386 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:30:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:51,386 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:30:51,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:30:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:30:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:30:51,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:51,386 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-04 12:30:51,387 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:51,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:51,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-04 12:30:51,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:51,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:51,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:51,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:51,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:52,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:52,168 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 [2018-10-04 12:30:52,175 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:52,209 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:30:52,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:52,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:52,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:52,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:30:52,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:30:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:30:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:30:52,245 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-10-04 12:30:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:52,327 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:30:52,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:30:52,327 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-10-04 12:30:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:52,328 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:30:52,328 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:30:52,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:30:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:30:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:30:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:30:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:30:52,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:30:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:52,333 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:30:52,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:30:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:30:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:30:52,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:52,334 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-04 12:30:52,334 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:52,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-04 12:30:52,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:52,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:52,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:52,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:52,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:52,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:52,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:52,976 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:30:52,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:52,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:53,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:53,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:30:53,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:30:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:30:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:30:53,018 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-04 12:30:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:53,671 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:30:53,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:30:53,672 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-04 12:30:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:53,672 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:30:53,672 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:30:53,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:30:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:30:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:30:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:30:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:30:53,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:30:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:53,677 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:30:53,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:30:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:30:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:30:53,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:53,678 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-04 12:30:53,678 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:53,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-04 12:30:53,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:53,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:53,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:53,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:53,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:54,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:54,629 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 [2018-10-04 12:30:54,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:54,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:54,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:54,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:30:54,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:30:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:30:54,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:30:54,715 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-10-04 12:30:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:54,783 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:30:54,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:30:54,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-10-04 12:30:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:54,784 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:30:54,785 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:30:54,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:30:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:30:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:30:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:30:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:30:54,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:30:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:54,788 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:30:54,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:30:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:30:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:30:54,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:54,789 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-04 12:30:54,789 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:54,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-04 12:30:54,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:54,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:54,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:54,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:54,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:55,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:55,391 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 [2018-10-04 12:30:55,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:55,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:55,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:55,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:55,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:55,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:30:55,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:30:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:30:55,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:30:55,452 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-04 12:30:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:55,516 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:30:55,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:30:55,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-04 12:30:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:55,518 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:30:55,518 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:30:55,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:30:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:30:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:30:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:30:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:30:55,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:30:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:55,522 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:30:55,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:30:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:30:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:30:55,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:55,522 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-04 12:30:55,523 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:55,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-04 12:30:55,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:55,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:55,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:55,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:55,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:56,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:56,162 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 [2018-10-04 12:30:56,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:56,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:30:56,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:56,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:56,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:56,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:30:56,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:30:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:30:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:30:56,244 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-10-04 12:30:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:56,308 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:30:56,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:30:56,309 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-10-04 12:30:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:56,309 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:30:56,310 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:30:56,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:30:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:30:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:30:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:30:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:30:56,313 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:30:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:56,313 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:30:56,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:30:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:30:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:30:56,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:56,314 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-04 12:30:56,314 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:56,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-04 12:30:56,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:56,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:56,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:56,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:56,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:57,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:57,237 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 [2018-10-04 12:30:57,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:57,281 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:57,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:57,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:57,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:57,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:30:57,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:30:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:30:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:30:57,313 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-04 12:30:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:57,382 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:30:57,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:30:57,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-04 12:30:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:57,383 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:30:57,383 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:30:57,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:30:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:30:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:30:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:30:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:30:57,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:30:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:57,386 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:30:57,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:30:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:30:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:30:57,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:57,387 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-04 12:30:57,387 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:57,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-04 12:30:57,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:57,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:57,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:57,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:57,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:58,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:58,268 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 [2018-10-04 12:30:58,274 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:58,308 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:30:58,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:58,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:58,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:58,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:30:58,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:30:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:30:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:30:58,349 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-10-04 12:30:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:58,414 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:30:58,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:30:58,415 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-10-04 12:30:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:58,416 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:30:58,416 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:30:58,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:30:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:30:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:30:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:30:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:30:58,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:30:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:58,420 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:30:58,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:30:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:30:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:30:58,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:58,421 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-04 12:30:58,421 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:58,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-04 12:30:58,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:58,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:58,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:58,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:58,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:59,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:59,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:30:59,442 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:59,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:30:59,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:59,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:59,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:59,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:30:59,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:30:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:30:59,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:30:59,510 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-04 12:30:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:59,576 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:30:59,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:30:59,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-04 12:30:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:59,577 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:30:59,577 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:30:59,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:30:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:30:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:30:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:30:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:30:59,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:30:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:59,581 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:30:59,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:30:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:30:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:30:59,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:59,582 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-04 12:30:59,583 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:59,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-04 12:30:59,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:59,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:59,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:59,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:59,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:00,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:00,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:00,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:00,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:00,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:00,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:31:00,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:31:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:31:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:31:00,548 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-10-04 12:31:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:00,609 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:31:00,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:31:00,609 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-10-04 12:31:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:00,610 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:31:00,610 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:31:00,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:31:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:31:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:31:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:31:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:31:00,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:31:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:00,614 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:31:00,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:31:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:31:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:31:00,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:00,614 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-10-04 12:31:00,615 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:00,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-10-04 12:31:00,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:00,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:00,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:00,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:00,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:01,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:01,460 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 [2018-10-04 12:31:01,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:01,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:01,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:01,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:01,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:01,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:31:01,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:31:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:31:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:31:01,543 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-04 12:31:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:01,603 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:31:01,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:31:01,603 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-04 12:31:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:01,604 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:31:01,604 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:31:01,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:31:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:31:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:31:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:31:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:31:01,608 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:31:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:31:01,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:31:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:31:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:31:01,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:01,609 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-10-04 12:31:01,609 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:01,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-10-04 12:31:01,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:01,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:01,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:01,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:01,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:02,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:02,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:02,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:02,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:31:02,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:02,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:02,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:02,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:31:02,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:31:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:31:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:31:02,643 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-10-04 12:31:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:03,253 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:31:03,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:31:03,254 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-10-04 12:31:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:03,254 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:31:03,254 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:31:03,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:31:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:31:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:31:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:31:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:31:03,257 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:31:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:03,258 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:31:03,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:31:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:31:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:31:03,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:03,258 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-10-04 12:31:03,259 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:03,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-10-04 12:31:03,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:03,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:03,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:03,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:03,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:04,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:04,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:04,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:04,581 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:04,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:04,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:04,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:04,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:31:04,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:31:04,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:31:04,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:31:04,627 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-04 12:31:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:04,713 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:31:04,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:31:04,714 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-04 12:31:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:04,715 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:31:04,715 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:31:04,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:31:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:31:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:31:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:31:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:31:04,718 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:31:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:04,718 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:31:04,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:31:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:31:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:31:04,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:04,719 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-10-04 12:31:04,719 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:04,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-10-04 12:31:04,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:04,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:04,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:04,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:04,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:05,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:05,755 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 [2018-10-04 12:31:05,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:05,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:31:05,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:05,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:05,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:05,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:31:05,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:31:05,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:31:05,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:31:05,846 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-10-04 12:31:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:05,930 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:31:05,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:31:05,930 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-10-04 12:31:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:05,931 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:31:05,931 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:31:05,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:31:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:31:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:31:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:31:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:31:05,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:31:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:05,934 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:31:05,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:31:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:31:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:31:05,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:05,935 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-10-04 12:31:05,936 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:05,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-10-04 12:31:05,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:05,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:05,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:05,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:06,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:06,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:06,948 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:31:06,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:06,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:06,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:06,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:31:06,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:31:06,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:31:06,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:31:06,980 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-04 12:31:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:07,036 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:31:07,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:31:07,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-04 12:31:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:07,037 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:31:07,037 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:31:07,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:31:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:31:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:31:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:31:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:31:07,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:31:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:07,041 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:31:07,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:31:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:31:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:31:07,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:07,041 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-10-04 12:31:07,042 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:07,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-10-04 12:31:07,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:07,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:07,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:07,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:08,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:08,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:08,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:08,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:31:08,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:31:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:31:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:31:08,514 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-10-04 12:31:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:08,588 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:31:08,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:31:08,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-10-04 12:31:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:08,589 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:31:08,589 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:31:08,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:31:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:31:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:31:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:31:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:31:08,593 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:31:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:08,594 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:31:08,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:31:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:31:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:31:08,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:08,594 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-10-04 12:31:08,595 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:08,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-10-04 12:31:08,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:08,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:08,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:08,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:10,013 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 [2018-10-04 12:31:10,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:10,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:10,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:10,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:10,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:10,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:31:10,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:31:10,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:31:10,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:31:10,098 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-04 12:31:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:10,206 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:31:10,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:31:10,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-04 12:31:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:10,207 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:31:10,207 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:31:10,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:31:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:31:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:31:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:31:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:31:10,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:31:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:10,210 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:31:10,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:31:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:31:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:31:10,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:10,211 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-10-04 12:31:10,211 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:10,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-10-04 12:31:10,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:10,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:11,228 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 [2018-10-04 12:31:11,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:11,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:31:11,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:11,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:11,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:11,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:31:11,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:31:11,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:31:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:31:11,350 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-10-04 12:31:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:11,463 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:31:11,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:31:11,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-10-04 12:31:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:11,464 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:31:11,464 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:31:11,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:31:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:31:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:31:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:31:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:31:11,467 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:31:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:11,468 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:31:11,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:31:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:31:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:31:11,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:11,469 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-10-04 12:31:11,469 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:11,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-10-04 12:31:11,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:11,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:12,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:12,624 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 [2018-10-04 12:31:12,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:12,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:12,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:12,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:12,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:12,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:31:12,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:31:12,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:31:12,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:31:12,708 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-04 12:31:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:12,940 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:31:12,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:31:12,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-04 12:31:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:12,942 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:31:12,942 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:31:12,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:31:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:31:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:31:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:31:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:31:12,946 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:31:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:31:12,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:31:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:31:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:31:12,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:12,947 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-10-04 12:31:12,947 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:12,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-10-04 12:31:12,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:12,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:12,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:12,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:14,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:14,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:14,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:14,423 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:31:14,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:14,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:14,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:14,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:31:14,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:31:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:31:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:31:14,473 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-10-04 12:31:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:14,627 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:31:14,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:31:14,627 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-10-04 12:31:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:14,628 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:31:14,628 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:31:14,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:31:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:31:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:31:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:31:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:31:14,631 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:31:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:14,631 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:31:14,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:31:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:31:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:31:14,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:14,632 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-10-04 12:31:14,632 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:14,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-10-04 12:31:14,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:14,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:14,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:14,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:14,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:15,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:15,804 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 [2018-10-04 12:31:15,811 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:15,852 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:31:15,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:15,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:15,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:15,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:31:15,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:31:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:31:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:31:15,894 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-04 12:31:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:15,989 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:31:15,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:31:15,989 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-04 12:31:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:15,990 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:31:15,990 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:31:15,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:31:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:31:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:31:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:31:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:31:15,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:31:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:15,993 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:31:15,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:31:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:31:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:31:15,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:15,994 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-10-04 12:31:15,994 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:15,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-10-04 12:31:15,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:15,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:15,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:15,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:17,349 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 [2018-10-04 12:31:17,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:17,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:17,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:17,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:31:17,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:31:17,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:31:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:31:17,424 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-10-04 12:31:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:17,515 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:31:17,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:31:17,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-10-04 12:31:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:17,517 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:31:17,517 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:31:17,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:31:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:31:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:31:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:31:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:31:17,520 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:31:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:17,521 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:31:17,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:31:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:31:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:31:17,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:17,521 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-10-04 12:31:17,522 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:17,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:17,522 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-10-04 12:31:17,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:17,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:17,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:17,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:18,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:18,892 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 [2018-10-04 12:31:18,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:18,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:18,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:18,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:18,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:18,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:31:18,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:31:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:31:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:31:18,966 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-04 12:31:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:19,034 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:31:19,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:31:19,035 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-04 12:31:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:19,036 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:31:19,036 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:31:19,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:31:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:31:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:31:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:31:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:31:19,040 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:31:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:19,040 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:31:19,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:31:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:31:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:31:19,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:19,041 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-10-04 12:31:19,041 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:19,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-10-04 12:31:19,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:19,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:19,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:20,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:20,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:20,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:20,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:31:20,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:20,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:20,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:20,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:31:20,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:31:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:31:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:31:20,641 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-10-04 12:31:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:20,742 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:31:20,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:31:20,743 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-10-04 12:31:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:20,744 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:31:20,744 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:31:20,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:31:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:31:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:31:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:31:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:31:20,748 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:31:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:20,748 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:31:20,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:31:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:31:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:31:20,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:20,749 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-10-04 12:31:20,749 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:20,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-10-04 12:31:20,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:20,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:20,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:20,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:22,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:22,345 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 [2018-10-04 12:31:22,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:22,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:22,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:22,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:22,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:22,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:31:22,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:31:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:31:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:31:22,440 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-04 12:31:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:22,552 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:31:22,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:31:22,552 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-04 12:31:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:22,553 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:31:22,553 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:31:22,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:31:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:31:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:31:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:31:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:31:22,557 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:31:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:22,558 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:31:22,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:31:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:31:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:31:22,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:22,558 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-10-04 12:31:22,558 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:22,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-10-04 12:31:22,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:22,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:22,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:22,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:22,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:24,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:24,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:24,546 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:24,599 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:31:24,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:24,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:24,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:24,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:31:24,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:31:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:31:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:31:24,642 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-10-04 12:31:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:24,726 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:31:24,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:31:24,727 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-10-04 12:31:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:24,727 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:31:24,727 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:31:24,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:31:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:31:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:31:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:31:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:31:24,731 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:31:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:24,731 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:31:24,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:31:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:31:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:31:24,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:24,731 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-10-04 12:31:24,732 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:24,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-10-04 12:31:24,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:24,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:24,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:24,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:26,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:26,112 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 [2018-10-04 12:31:26,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:26,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:31:26,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:26,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:26,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:26,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:31:26,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:31:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:31:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:31:26,215 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-04 12:31:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:26,319 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:31:26,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:31:26,320 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-04 12:31:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:26,321 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:31:26,321 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:31:26,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:31:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:31:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:31:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:31:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:31:26,324 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:31:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:26,324 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:31:26,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:31:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:31:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:31:26,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:26,325 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-10-04 12:31:26,325 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:26,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-10-04 12:31:26,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:26,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:26,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:26,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:26,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:27,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:27,886 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 [2018-10-04 12:31:27,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:27,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:27,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:27,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:31:27,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:31:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:31:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:31:27,979 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-10-04 12:31:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:28,145 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:31:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:31:28,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-10-04 12:31:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:28,146 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:31:28,146 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:31:28,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:31:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:31:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:31:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:31:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:31:28,149 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:31:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:28,149 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:31:28,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:31:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:31:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:31:28,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:28,150 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-10-04 12:31:28,150 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:28,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-10-04 12:31:28,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:28,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:28,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:28,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:29,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:29,905 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 [2018-10-04 12:31:29,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:29,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:29,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:29,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:29,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:29,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:31:29,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:31:29,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:31:29,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:31:29,995 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-04 12:31:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:30,171 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:31:30,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:31:30,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-04 12:31:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:30,172 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:31:30,172 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:31:30,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:31:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:31:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:31:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:31:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:31:30,176 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:31:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:30,176 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:31:30,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:31:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:31:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:31:30,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:30,177 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-10-04 12:31:30,178 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:30,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-10-04 12:31:30,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:30,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:30,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:30,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:30,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:33,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:33,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:33,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:33,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:31:33,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:33,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:33,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:33,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:31:33,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:31:33,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:31:33,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:31:33,648 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-10-04 12:31:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:33,755 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:31:33,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:31:33,755 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-10-04 12:31:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:33,756 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:31:33,756 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:31:33,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:31:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:31:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:31:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:31:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:31:33,760 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:31:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:33,760 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:31:33,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:31:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:31:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:31:33,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:33,761 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-10-04 12:31:33,761 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:33,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-10-04 12:31:33,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:33,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:33,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:33,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:33,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:35,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:35,766 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 [2018-10-04 12:31:35,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:35,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:35,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:35,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:35,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:35,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:31:35,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:31:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:31:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:31:35,876 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-04 12:31:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:35,971 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:31:35,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:31:35,971 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-04 12:31:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:35,972 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:31:35,972 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:31:35,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:31:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:31:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:31:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:31:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:31:35,975 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:31:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:35,976 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:31:35,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:31:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:31:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:31:35,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:35,976 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-10-04 12:31:35,976 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:35,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-10-04 12:31:35,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:35,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:35,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:35,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:37,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:37,524 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 [2018-10-04 12:31:37,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:37,586 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:31:37,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:37,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:37,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:37,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:31:37,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:31:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:31:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:31:37,623 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-04 12:31:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:37,714 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:31:37,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:31:37,715 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-04 12:31:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:37,716 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:31:37,716 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:31:37,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:31:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:31:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:31:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:31:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:31:37,720 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:31:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:37,720 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:31:37,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:31:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:31:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:31:37,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:37,721 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-10-04 12:31:37,721 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:37,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-10-04 12:31:37,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:37,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:37,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:37,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:37,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:40,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:40,296 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 [2018-10-04 12:31:40,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:40,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:31:40,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:40,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:40,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:40,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:31:40,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:31:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:31:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:31:40,475 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-04 12:31:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:40,598 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:31:40,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:31:40,598 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-04 12:31:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:40,599 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:31:40,599 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:31:40,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:31:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:31:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:31:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:31:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:31:40,603 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 12:31:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:40,604 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:31:40,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:31:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:31:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:31:40,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:40,604 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-10-04 12:31:40,605 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:40,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-10-04 12:31:40,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:40,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:40,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:42,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:42,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -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 [2018-10-04 12:31:42,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:42,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:42,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:42,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:31:42,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:31:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:31:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:31:42,362 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-04 12:31:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:42,525 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 12:31:42,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:31:42,526 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-04 12:31:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:42,527 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:31:42,527 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:31:42,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:31:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:31:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:31:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:31:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:31:42,530 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 12:31:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:42,530 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:31:42,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:31:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:31:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:31:42,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:42,531 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-10-04 12:31:42,531 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:42,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-10-04 12:31:42,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:42,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:42,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:42,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:44,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:44,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:44,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:44,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:44,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:44,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:44,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:44,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:31:44,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:31:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:31:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:31:44,372 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-04 12:31:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:44,471 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:31:44,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:31:44,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-04 12:31:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:44,472 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:31:44,472 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:31:44,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:31:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:31:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:31:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:31:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:31:44,475 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 12:31:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:44,476 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:31:44,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:31:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:31:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:31:44,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:44,477 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-10-04 12:31:44,477 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:44,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-10-04 12:31:44,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:44,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:44,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:44,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:44,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:46,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:46,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:46,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:46,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:31:46,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:46,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:46,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:46,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:31:46,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:31:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:31:46,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:31:46,606 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-04 12:31:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:46,760 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 12:31:46,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:31:46,761 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-04 12:31:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:46,762 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:31:46,762 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:31:46,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:31:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:31:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:31:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:31:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:31:46,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 12:31:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:46,766 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:31:46,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:31:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:31:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:31:46,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:46,766 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-10-04 12:31:46,767 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:46,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-10-04 12:31:46,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:46,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:46,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:46,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:46,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:48,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:48,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:48,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:48,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:48,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:48,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:48,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:48,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:31:48,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:31:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:31:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:31:48,657 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-04 12:31:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:50,444 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:31:50,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:31:50,444 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-04 12:31:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:50,445 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:31:50,445 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:31:50,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:31:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:31:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:31:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:31:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:31:50,448 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 12:31:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:50,449 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:31:50,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:31:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:31:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:31:50,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:50,449 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-10-04 12:31:50,450 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:50,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-10-04 12:31:50,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:50,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:50,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:50,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:53,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:53,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:53,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:53,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:31:53,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:53,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:53,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:53,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:31:53,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:31:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:31:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:31:53,134 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-04 12:31:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:53,315 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 12:31:53,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:31:53,316 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-04 12:31:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:53,317 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:31:53,317 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:31:53,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:31:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:31:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:31:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:31:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:31:53,321 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 12:31:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:53,321 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:31:53,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:31:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:31:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:31:53,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:53,322 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-10-04 12:31:53,322 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:53,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-10-04 12:31:53,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:53,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:53,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:55,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:55,640 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 [2018-10-04 12:31:55,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:55,710 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:31:55,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:55,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:55,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:55,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:31:55,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:31:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:31:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:31:55,770 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-04 12:31:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:55,883 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:31:55,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:31:55,884 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-04 12:31:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:55,884 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:31:55,884 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:31:55,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:31:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:31:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:31:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:31:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:31:55,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 12:31:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:55,888 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:31:55,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:31:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:31:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:31:55,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:55,889 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-10-04 12:31:55,889 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:55,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-10-04 12:31:55,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:55,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:55,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:55,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:55,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:57,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:57,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:31:57,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:57,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:57,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:57,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:31:57,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:31:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:31:57,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:31:57,914 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-04 12:31:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:58,061 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 12:31:58,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:31:58,061 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-04 12:31:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:58,062 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:31:58,063 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:31:58,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:31:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:31:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:31:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:31:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:31:58,066 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 12:31:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:58,066 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:31:58,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:31:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:31:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:31:58,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:58,067 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-10-04 12:31:58,067 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:58,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-10-04 12:31:58,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:58,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:58,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:58,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:58,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:00,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:00,155 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 [2018-10-04 12:32:00,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:00,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:00,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:00,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:00,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:00,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:32:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:32:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:32:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:32:00,258 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-04 12:32:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:00,540 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:32:00,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:32:00,541 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-04 12:32:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:00,541 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:32:00,541 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:32:00,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:32:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:32:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:32:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:32:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:32:00,543 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 12:32:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:00,544 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:32:00,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:32:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:32:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:32:00,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:00,544 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-10-04 12:32:00,544 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:00,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-10-04 12:32:00,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:00,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:00,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:00,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:00,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:02,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:02,942 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 [2018-10-04 12:32:02,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:03,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:32:03,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:03,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:03,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:03,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:32:03,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:32:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:32:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:32:03,059 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-04 12:32:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,172 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 12:32:03,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:32:03,172 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-04 12:32:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,173 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:32:03,173 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:32:03,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:32:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:32:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:32:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:32:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:32:03,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 12:32:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,176 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:32:03,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:32:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:32:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:32:03,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,177 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-10-04 12:32:03,177 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-10-04 12:32:03,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:03,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:05,524 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 [2018-10-04 12:32:05,541 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:05,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:05,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:05,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:05,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:32:05,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:32:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:32:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:32:05,638 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-04 12:32:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:06,726 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:32:06,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:32:06,726 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-04 12:32:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:06,727 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:32:06,727 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:32:06,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:32:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:32:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:32:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:32:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 12:32:06,730 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 12:32:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:06,731 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 12:32:06,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:32:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 12:32:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:32:06,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:06,732 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-10-04 12:32:06,732 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:06,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-10-04 12:32:06,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:06,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:06,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:06,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:09,287 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 [2018-10-04 12:32:09,294 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:09,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:32:09,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:09,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:09,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:09,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:32:09,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:32:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:32:09,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:32:09,402 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-04 12:32:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:09,633 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 12:32:09,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:32:09,633 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-04 12:32:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:09,634 INFO L225 Difference]: With dead ends: 82 [2018-10-04 12:32:09,634 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:32:09,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:32:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:32:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:32:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:32:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:32:09,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 12:32:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:09,637 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:32:09,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:32:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:32:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:32:09,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:09,638 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-10-04 12:32:09,638 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:09,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:09,638 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-10-04 12:32:09,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:09,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:09,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:09,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:12,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:12,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:12,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 12:32:12,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:12,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:12,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:32:12,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:32:12,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:32:12,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:32:12,243 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-10-04 12:32:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:12,396 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:32:12,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:32:12,397 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-10-04 12:32:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:12,397 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:32:12,398 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:32:12,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:32:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:32:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:32:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:32:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 12:32:12,401 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 12:32:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:12,402 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 12:32:12,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:32:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 12:32:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 12:32:12,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:12,403 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-10-04 12:32:12,403 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:12,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-10-04 12:32:12,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:12,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:12,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:12,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:14,752 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 [2018-10-04 12:32:14,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:14,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:14,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:14,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:32:14,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:32:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:32:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:32:14,853 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-04 12:32:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:15,021 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 12:32:15,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:32:15,021 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-04 12:32:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:15,022 INFO L225 Difference]: With dead ends: 84 [2018-10-04 12:32:15,022 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:32:15,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:32:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:32:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:32:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:32:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:32:15,026 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 12:32:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:15,026 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:32:15,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:32:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:32:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:32:15,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:15,026 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-10-04 12:32:15,027 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:15,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-10-04 12:32:15,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:15,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:15,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:15,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:15,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:17,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:17,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:17,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:17,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:17,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:17,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:17,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:17,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:32:17,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:32:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:32:17,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:32:17,930 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-10-04 12:32:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:18,060 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:32:18,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:32:18,060 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-10-04 12:32:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:18,061 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:32:18,061 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:32:18,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:32:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:32:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 12:32:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:32:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 12:32:18,064 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 12:32:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:18,064 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 12:32:18,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:32:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 12:32:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:32:18,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:18,065 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-10-04 12:32:18,065 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:18,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-10-04 12:32:18,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:18,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:18,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:21,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:21,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:21,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:32:21,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:21,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:21,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:21,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:32:21,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:32:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:32:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:32:21,136 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-04 12:32:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:21,302 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 12:32:21,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:32:21,303 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-04 12:32:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:21,303 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:32:21,304 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:32:21,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:32:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:32:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:32:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:32:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:32:21,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 12:32:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:21,307 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:32:21,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:32:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:32:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:32:21,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:21,307 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-10-04 12:32:21,307 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:21,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-10-04 12:32:21,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:21,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:21,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:21,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:23,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:23,910 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 [2018-10-04 12:32:23,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:23,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:23,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:23,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:24,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:24,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:32:24,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:32:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:32:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:32:24,009 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-10-04 12:32:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:24,164 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:32:24,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:32:24,165 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-10-04 12:32:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:24,166 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:32:24,166 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:32:24,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:32:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:32:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:32:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:32:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 12:32:24,169 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 12:32:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:24,170 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 12:32:24,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:32:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 12:32:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 12:32:24,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:24,171 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-10-04 12:32:24,171 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:24,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-10-04 12:32:24,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:24,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:24,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:24,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:24,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:27,210 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 [2018-10-04 12:32:27,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:27,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:32:27,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:27,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:27,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:32:27,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:32:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:32:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:32:27,349 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-04 12:32:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:27,633 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 12:32:27,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:32:27,633 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-04 12:32:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:27,634 INFO L225 Difference]: With dead ends: 88 [2018-10-04 12:32:27,634 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:32:27,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:32:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:32:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:32:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:32:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:32:27,638 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 12:32:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:27,638 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:32:27,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:32:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:32:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:32:27,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:27,639 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-10-04 12:32:27,639 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:27,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-10-04 12:32:27,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:27,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:27,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:27,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:30,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:30,189 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 [2018-10-04 12:32:30,196 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:30,268 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:32:30,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:30,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:30,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:30,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:32:30,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:32:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:32:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:32:30,308 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-10-04 12:32:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:30,435 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:32:30,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:32:30,435 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-10-04 12:32:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:30,436 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:32:30,436 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:32:30,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:32:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:32:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:32:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:32:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 12:32:30,440 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 12:32:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:30,440 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 12:32:30,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:32:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 12:32:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:32:30,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:30,441 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-10-04 12:32:30,442 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:30,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-10-04 12:32:30,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:30,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:30,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:30,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:30,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:33,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:33,514 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 [2018-10-04 12:32:33,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:33,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:33,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:33,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:32:33,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:32:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:32:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:32:33,630 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-04 12:32:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:33,846 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 12:32:33,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:32:33,847 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-04 12:32:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:33,848 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:32:33,848 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:32:33,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:32:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:32:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:32:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:32:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:32:33,852 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 12:32:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:33,852 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:32:33,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:32:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:32:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:32:33,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:33,853 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-10-04 12:32:33,853 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:33,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-10-04 12:32:33,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:33,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:33,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:36,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:36,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:36,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:37,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:37,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:37,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:37,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:37,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:32:37,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:32:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:32:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:32:37,086 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-10-04 12:32:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:37,294 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:32:37,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:32:37,294 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-10-04 12:32:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:37,295 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:32:37,295 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 12:32:37,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:32:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 12:32:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 12:32:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:32:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 12:32:37,298 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 12:32:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:37,299 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 12:32:37,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:32:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 12:32:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:32:37,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:37,299 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-10-04 12:32:37,299 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:37,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:37,300 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-10-04 12:32:37,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:37,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:37,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:37,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:37,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:40,047 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 [2018-10-04 12:32:40,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:40,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 12:32:40,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:40,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:40,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:40,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:32:40,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:32:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:32:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:32:40,174 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-04 12:32:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:40,333 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 12:32:40,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:32:40,334 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-04 12:32:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:40,335 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:32:40,335 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:32:40,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:32:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:32:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:32:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:32:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:32:40,338 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 12:32:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:40,338 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:32:40,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:32:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:32:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:32:40,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:40,338 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-10-04 12:32:40,339 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:40,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-10-04 12:32:40,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:40,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:40,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:40,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:40,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:43,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:43,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:43,385 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:43,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:43,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:43,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:43,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:43,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:32:43,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:32:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:32:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:32:43,479 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-10-04 12:32:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:43,630 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:32:43,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:32:43,630 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-10-04 12:32:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:43,631 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:32:43,631 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:32:43,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:32:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:32:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:32:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:32:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 12:32:43,635 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 12:32:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:43,635 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 12:32:43,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:32:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 12:32:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 12:32:43,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:43,635 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-10-04 12:32:43,636 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:43,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-10-04 12:32:43,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:43,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:43,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:43,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:43,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:46,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:46,829 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 [2018-10-04 12:32:46,837 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:46,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:32:46,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:46,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:46,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:46,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:32:46,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:32:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:32:46,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:32:46,962 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-04 12:32:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:47,185 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 12:32:47,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:32:47,186 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-04 12:32:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:47,187 INFO L225 Difference]: With dead ends: 94 [2018-10-04 12:32:47,187 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:32:47,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:32:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:32:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:32:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:32:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:32:47,190 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 12:32:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:47,190 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:32:47,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:32:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:32:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:32:47,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:47,191 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-10-04 12:32:47,191 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:47,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-10-04 12:32:47,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:47,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:47,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:47,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:47,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:50,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:50,062 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 [2018-10-04 12:32:50,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:50,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 12:32:50,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:50,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:50,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:50,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:32:50,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:32:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:32:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:32:50,293 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-10-04 12:32:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:50,454 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:32:50,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:32:50,455 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-10-04 12:32:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:50,456 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:32:50,456 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:32:50,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:32:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:32:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:32:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:32:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 12:32:50,459 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 12:32:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:50,459 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 12:32:50,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:32:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 12:32:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:32:50,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:50,460 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-10-04 12:32:50,460 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:50,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-10-04 12:32:50,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:50,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:50,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:50,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:53,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:53,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:32:53,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:53,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:53,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:53,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:32:53,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:32:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:32:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:32:53,839 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-04 12:32:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:53,988 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 12:32:53,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:32:53,989 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-04 12:32:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:53,990 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:32:53,990 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:32:53,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:32:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:32:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:32:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:32:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:32:53,993 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 12:32:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:53,993 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:32:53,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:32:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:32:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:32:53,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:53,994 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-10-04 12:32:53,994 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:53,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-10-04 12:32:53,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:53,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:53,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:53,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:53,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:57,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:57,754 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 [2018-10-04 12:32:57,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:32:57,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:32:57,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:57,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:57,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:57,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:32:57,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:32:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:32:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:32:57,871 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-10-04 12:32:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:58,839 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:32:58,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:32:58,840 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-10-04 12:32:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:58,841 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:32:58,841 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:32:58,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:32:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:32:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:32:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:32:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 12:32:58,844 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 12:32:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:58,844 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 12:32:58,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:32:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 12:32:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:32:58,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:58,845 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-10-04 12:32:58,845 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:58,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-10-04 12:32:58,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:58,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:58,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:58,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:58,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:02,267 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 [2018-10-04 12:33:02,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:02,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 12:33:02,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:02,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:02,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:02,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:33:02,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:33:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:33:02,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:33:02,413 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-04 12:33:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:02,655 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 12:33:02,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:33:02,655 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-04 12:33:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:02,656 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:33:02,656 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:33:02,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:33:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:33:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:33:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:33:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:33:02,660 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 12:33:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:02,660 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:33:02,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:33:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:33:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:33:02,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:02,661 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-10-04 12:33:02,662 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:02,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-10-04 12:33:02,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:02,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:02,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:02,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:02,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:05,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:05,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:05,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:05,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:05,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:05,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:05,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:05,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:33:05,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:33:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:33:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:33:05,927 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-10-04 12:33:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:06,177 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:33:06,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:33:06,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-10-04 12:33:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:06,179 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:33:06,179 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:33:06,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:33:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:33:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 12:33:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:33:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 12:33:06,183 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 12:33:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:06,184 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 12:33:06,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:33:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 12:33:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:33:06,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:06,184 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-10-04 12:33:06,185 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:06,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-10-04 12:33:06,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:06,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:06,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:06,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:06,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:09,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:33:09,756 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:33:09,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:33:09,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:09,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:09,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:09,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:33:09,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:33:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:33:09,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:33:09,907 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-04 12:33:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:10,160 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 12:33:10,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:33:10,161 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-04 12:33:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:10,162 INFO L225 Difference]: With dead ends: 100 [2018-10-04 12:33:10,162 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:33:10,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:33:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:33:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:33:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:33:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:33:10,166 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 12:33:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:10,166 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:33:10,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:33:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:33:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:33:10,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:10,167 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-10-04 12:33:10,167 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:10,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-10-04 12:33:10,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:10,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:10,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:10,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:13,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:13,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:33:13,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:33:13,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:13,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:13,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:13,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:33:13,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 12:33:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 12:33:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:33:13,813 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-10-04 12:33:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:13,999 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:33:13,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:33:13,999 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-10-04 12:33:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:14,000 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:33:14,000 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:33:14,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:33:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:33:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:33:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:33:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 12:33:14,004 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 12:33:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:14,004 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 12:33:14,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 12:33:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 12:33:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 12:33:14,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:14,005 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-10-04 12:33:14,005 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:14,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-10-04 12:33:14,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:14,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:14,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:14,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:17,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:33:17,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:17,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:17,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:17,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 12:33:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:33:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:33:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:33:17,861 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-04 12:33:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:18,031 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 12:33:18,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:33:18,031 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-04 12:33:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:18,032 INFO L225 Difference]: With dead ends: 102 [2018-10-04 12:33:18,032 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:33:18,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:33:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:33:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:33:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:33:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:33:18,036 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 12:33:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:18,036 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:33:18,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:33:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:33:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:33:18,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:18,037 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-10-04 12:33:18,037 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:18,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-10-04 12:33:18,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:18,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:18,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:33:18,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:21,467 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 [2018-10-04 12:33:21,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:33:21,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:33:21,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:21,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:21,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:21,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:33:21,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:33:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:33:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:33:21,575 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-10-04 12:33:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:21,752 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:33:21,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:33:21,753 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-10-04 12:33:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:21,754 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:33:21,754 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:33:21,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:33:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:33:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 12:33:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:33:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 12:33:21,758 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 12:33:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:21,758 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 12:33:21,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:33:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 12:33:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:33:21,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:21,759 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-10-04 12:33:21,759 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:21,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-10-04 12:33:21,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:21,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:25,511 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 [2018-10-04 12:33:25,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:33:25,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 12:33:25,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:25,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:25,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:25,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 12:33:25,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:33:25,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:33:25,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:33:25,661 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-04 12:33:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:25,939 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 12:33:25,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:33:25,939 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-04 12:33:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:25,940 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:33:25,940 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:33:25,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:33:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:33:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:33:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:33:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:33:25,945 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 12:33:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:25,945 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:33:25,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:33:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:33:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:33:25,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:25,945 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-10-04 12:33:25,946 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:25,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-10-04 12:33:25,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:25,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:25,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:25,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:33:31,487 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 [2018-10-04 12:33:31,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:33:31,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:33:31,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:33:31,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:33:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:31,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:33:31,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 12:33:31,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 12:33:31,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 12:33:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:33:31,813 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-10-04 12:33:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:38,627 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:33:38,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:33:38,627 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-10-04 12:33:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:38,629 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:33:38,629 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:33:38,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:33:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:33:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:33:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:33:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 12:33:38,636 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 12:33:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 12:33:38,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 12:33:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 12:33:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:33:38,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:33:38,637 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-10-04 12:33:38,637 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:33:38,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:33:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-10-04 12:33:38,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:33:38,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:33:38,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:33:38,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:33:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:33:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:33:43,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:33:43,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-04 12:33:43,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:33:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:33:43,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:33:43,602 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-04 12:33:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:33:43,774 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 12:33:43,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 12:33:43,775 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-04 12:33:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:33:43,775 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:33:43,775 INFO L226 Difference]: Without dead ends: 0 [2018-10-04 12:33:43,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:33:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-04 12:33:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-04 12:33:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-04 12:33:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-04 12:33:43,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-10-04 12:33:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:33:43,777 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-04 12:33:43,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:33:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-04 12:33:43,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-04 12:33:43,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-04 12:33:43,920 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-10-04 12:33:45,996 WARN L178 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 610 [2018-10-04 12:33:46,006 INFO L425 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-10-04 12:33:46,006 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-10-04 12:33:46,006 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-10-04 12:33:46,009 INFO L421 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-10-04 12:33:46,009 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-10-04 12:33:46,052 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:33:46 BoogieIcfgContainer [2018-10-04 12:33:46,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:33:46,053 INFO L168 Benchmark]: Toolchain (without parser) took 194807.01 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 11.5 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -13.2 MB). Peak memory consumption was 595.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:33:46,054 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 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. [2018-10-04 12:33:46,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.50 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. [2018-10-04 12:33:46,055 INFO L168 Benchmark]: Boogie Preprocessor took 21.82 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. [2018-10-04 12:33:46,055 INFO L168 Benchmark]: RCFGBuilder took 216.05 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. [2018-10-04 12:33:46,055 INFO L168 Benchmark]: TraceAbstraction took 194520.91 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 11.5 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.3 MB). Peak memory consumption was 574.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:33:46,057 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 0.27 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 43.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.82 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 216.05 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 194520.91 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 11.5 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.3 MB). Peak memory consumption was 574.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 194.4s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 23.8s AutomataDifference, 0.0s DeadEndRemovalTime, 2.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19355 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10403 GetRequests, 5148 SyntacticMatches, 2 SemanticMatches, 5253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 154.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 158.0s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1494 NumberOfCheckSat, 10403 ConstructedInterpolants, 0 QuantifiedInterpolants, 2204123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 202 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-33-46-069.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-33-46-069.csv Received shutdown request...