java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:30:11,989 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:30:11,991 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:30:12,008 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:30:12,009 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:30:12,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:30:12,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:30:12,013 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:30:12,014 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:30:12,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:30:12,016 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:30:12,049 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:30:12,066 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:30:12,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:30:12,067 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:30:12,067 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:30:12,068 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:30:12,068 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:30:12,068 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:30:12,068 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:30:12,069 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:30:12,069 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:30:12,069 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:30:12,069 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:30:12,069 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:30:12,070 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:30:12,070 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:30:12,070 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:30:12,070 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:30:12,070 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:30:12,071 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:30:12,071 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:30:12,071 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:30:12,071 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:30:12,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:30:12,072 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:30:12,072 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:30:12,072 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:30:12,072 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:30:12,072 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:30:12,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:30:12,073 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:30:12,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:30:12,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:30:12,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:30:12,152 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:30:12,152 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:30:12,153 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-30 10:30:12,154 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-30 10:30:12,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:30:12,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:30:12,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:30:12,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:30:12,214 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:30:12,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,256 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:30:12,256 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:30:12,256 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:30:12,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:30:12,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:30:12,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:30:12,260 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:30:12,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... [2018-09-30 10:30:12,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:30:12,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:30:12,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:30:12,285 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:30:12,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:30:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-30 10:30:12,359 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-30 10:30:12,511 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:30:12,511 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:30:12 BoogieIcfgContainer [2018-09-30 10:30:12,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:30:12,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:30:12,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:30:12,516 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:30:12,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:30:12" (1/2) ... [2018-09-30 10:30:12,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40253835 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:30:12, skipping insertion in model container [2018-09-30 10:30:12,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:30:12" (2/2) ... [2018-09-30 10:30:12,519 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-30 10:30:12,529 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:30:12,537 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:30:12,585 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:30:12,585 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:30:12,586 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:30:12,586 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:30:12,586 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:30:12,586 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:30:12,587 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:30:12,587 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:30:12,587 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:30:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 10:30:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 10:30:12,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:12,609 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 10:30:12,610 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:12,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 10:30:12,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:12,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:12,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:12,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:12,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:12,776 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:30:12,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:30:12,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:30:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:30:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:30:12,798 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 10:30:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:12,838 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:30:12,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:30:12,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 10:30:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:12,851 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:30:12,851 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 10:30:12,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:30:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 10:30:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 10:30:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 10:30:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 10:30:12,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 10:30:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:12,893 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 10:30:12,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:30:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 10:30:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:30:12,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:12,894 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:30:12,895 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:12,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:12,895 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 10:30:12,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:12,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:12,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:13,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:13,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:13,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:13,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 10:30:13,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:30:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:30:13,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:30:13,161 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-30 10:30:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:13,269 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 10:30:13,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:30:13,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-30 10:30:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:13,270 INFO L225 Difference]: With dead ends: 6 [2018-09-30 10:30:13,270 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:30:13,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:30:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:30:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:30:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:30:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:30:13,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:30:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:13,275 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:30:13,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:30:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:30:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:30:13,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:13,275 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 10:30:13,276 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:13,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 10:30:13,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:13,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:13,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:13,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:13,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-30 10:30:13,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:13,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:13,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:13,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:13,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:30:13,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:30:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:30:13,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:30:13,531 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 10:30:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:13,593 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 10:30:13,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:30:13,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 10:30:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:13,594 INFO L225 Difference]: With dead ends: 7 [2018-09-30 10:30:13,594 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:30:13,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:30:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:30:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:30:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:30:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:30:13,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:30:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:13,599 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:30:13,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:30:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:30:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:30:13,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:13,600 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 10:30:13,601 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:13,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 10:30:13,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:13,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:13,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:13,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:13,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:13,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:13,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:13,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:30:13,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:13,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:13,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:13,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:30:13,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:30:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:30:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:30:13,906 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 10:30:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:14,036 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:30:14,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:30:14,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 10:30:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:14,037 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:30:14,037 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:30:14,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:30:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:30:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:30:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:30:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:30:14,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:30:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:14,041 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:30:14,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:30:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:30:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:30:14,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:14,042 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 10:30:14,042 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:14,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 10:30:14,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:14,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:14,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:14,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:14,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:14,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:14,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:14,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:14,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:14,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:14,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:14,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:30:14,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:30:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:30:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:30:14,264 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 10:30:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:14,410 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:30:14,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:30:14,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 10:30:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:14,412 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:30:14,412 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:30:14,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:30:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:30:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:30:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:30:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:30:14,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:30:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:14,418 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:30:14,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:30:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:30:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:30:14,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:14,419 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 10:30:14,419 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:14,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 10:30:14,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:14,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:14,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:14,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:14,569 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:14,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:30:14,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:14,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:14,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:14,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:30:14,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:30:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:30:14,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:30:14,610 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 10:30:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:14,719 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:30:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:30:14,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 10:30:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:14,721 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:30:14,721 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:30:14,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:30:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:30:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:30:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:30:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:30:14,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:30:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:14,727 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:30:14,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:30:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:30:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:30:14,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:14,728 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 10:30:14,728 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:14,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 10:30:14,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:14,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:14,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:14,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:15,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:15,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:15,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:15,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:30:15,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:15,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:15,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:15,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:30:15,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:30:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:30:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:30:15,310 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 10:30:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:15,416 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:30:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:30:15,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 10:30:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:15,417 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:30:15,417 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:30:15,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:30:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:30:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:30:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:30:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:30:15,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:30:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:15,422 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:30:15,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:30:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:30:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:30:15,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:15,423 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 10:30:15,425 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:15,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 10:30:15,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:15,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:15,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:15,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:15,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:15,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:15,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:15,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:15,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:15,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:15,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:30:15,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:30:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:30:15,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:30:15,653 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 10:30:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:15,754 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:30:15,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:30:15,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 10:30:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:15,756 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:30:15,756 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:30:15,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:30:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:30:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:30:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:30:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:30:15,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:30:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:15,762 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:30:15,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:30:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:30:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:30:15,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:15,763 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 10:30:15,763 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:15,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 10:30:15,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:15,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:15,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:15,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:15,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:15,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:15,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:15,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:16,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:16,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:16,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:16,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:16,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:30:16,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:30:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:30:16,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:30:16,034 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 10:30:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:16,142 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:30:16,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:30:16,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 10:30:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:16,145 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:30:16,145 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:30:16,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:30:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:30:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:30:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:30:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:30:16,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:30:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:16,150 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:30:16,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:30:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:30:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:30:16,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:16,151 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 10:30:16,151 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:16,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 10:30:16,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:16,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:16,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:16,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:16,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:16,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:16,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:16,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:30:16,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:16,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:16,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:16,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:30:16,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:30:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:30:16,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:30:16,423 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 10:30:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:16,532 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:30:16,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:30:16,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 10:30:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:16,534 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:30:16,534 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:30:16,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:30:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:30:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:30:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:30:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:30:16,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:30:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:16,538 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:30:16,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:30:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:30:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:30:16,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:16,539 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 10:30:16,539 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:16,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 10:30:16,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:16,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:16,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:16,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:16,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:16,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:16,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:16,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:16,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:16,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:16,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:16,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:30:16,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:30:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:30:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:30:16,780 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 10:30:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:16,911 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:30:16,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:30:16,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 10:30:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:16,913 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:30:16,913 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:30:16,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:30:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:30:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:30:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:30:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:30:16,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:30:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:16,919 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:30:16,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:30:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:30:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:30:16,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:16,920 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 10:30:16,920 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:16,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 10:30:16,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:16,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:16,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:16,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:17,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:17,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:17,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:17,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:30:17,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:17,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:17,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:17,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:30:17,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:30:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:30:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:30:17,351 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 10:30:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:17,554 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:30:17,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:30:17,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:30:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:17,555 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:30:17,555 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:30:17,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:30:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:30:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:30:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:30:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:30:17,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:30:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:17,560 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:30:17,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:30:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:30:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:30:17,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:17,561 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 10:30:17,561 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:17,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:17,562 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 10:30:17,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:17,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:17,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:17,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:17,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:17,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:17,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:17,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:17,864 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:30:17,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:17,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:17,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:17,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:30:17,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:30:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:30:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:30:17,898 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 10:30:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:18,068 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:30:18,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:30:18,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:30:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:18,069 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:30:18,070 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:30:18,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:30:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:30:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:30:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:30:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:30:18,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:30:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:18,075 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:30:18,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:30:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:30:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:30:18,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:18,076 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 10:30:18,076 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:18,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 10:30:18,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:18,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:18,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:18,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:18,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:18,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:18,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:18,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:18,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:18,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:18,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:30:18,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:30:18,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:30:18,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:30:18,388 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 10:30:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:18,660 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:30:18,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:30:18,661 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 10:30:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:18,662 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:30:18,662 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:30:18,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:30:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:30:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:30:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:30:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:30:18,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:30:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:18,668 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:30:18,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:30:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:30:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:30:18,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:18,669 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 10:30:18,669 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:18,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 10:30:18,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:18,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:18,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:18,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:18,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:18,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:18,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:18,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:18,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:18,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:18,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:18,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:18,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:30:18,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:30:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:30:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:30:18,997 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 10:30:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:19,328 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:30:19,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:30:19,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 10:30:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:19,330 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:30:19,330 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:30:19,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:30:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:30:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:30:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:30:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:30:19,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:30:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:19,336 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:30:19,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:30:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:30:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:30:19,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:19,337 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 10:30:19,337 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:19,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 10:30:19,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:19,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:19,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:19,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:19,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:19,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:19,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:30:19,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:19,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:19,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:19,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:30:19,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:30:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:30:19,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:30:19,705 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 10:30:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:20,013 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:30:20,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:30:20,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 10:30:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:20,015 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:30:20,015 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:30:20,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:30:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:30:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:30:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:30:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:30:20,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:30:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:20,021 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:30:20,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:30:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:30:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:30:20,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:20,022 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 10:30:20,022 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:20,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 10:30:20,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:20,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:20,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:20,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:20,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:20,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:20,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:20,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:20,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:20,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:20,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:20,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:20,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:30:20,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:30:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:30:20,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:30:20,377 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 10:30:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:20,644 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:30:20,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:30:20,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 10:30:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:20,645 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:30:20,645 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:30:20,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:30:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:30:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:30:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:30:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:30:20,651 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:30:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:20,651 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:30:20,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:30:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:30:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:30:20,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:20,652 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 10:30:20,652 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:20,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:20,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 10:30:20,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:20,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:20,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:20,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:20,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:21,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:21,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:21,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:21,077 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:30:21,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:21,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:21,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:21,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:30:21,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:30:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:30:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:30:21,120 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 10:30:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:21,398 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:30:21,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:30:21,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 10:30:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:21,399 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:30:21,399 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:30:21,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:30:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:30:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:30:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:30:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:30:21,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:30:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:21,405 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:30:21,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:30:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:30:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:30:21,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:21,406 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 10:30:21,406 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:21,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:21,406 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 10:30:21,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:21,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:21,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:21,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:21,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:21,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:21,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:21,846 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:30:21,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:21,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:21,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:21,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:30:21,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:30:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:30:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:30:21,878 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 10:30:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:22,192 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:30:22,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:30:22,192 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 10:30:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:22,193 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:30:22,194 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:30:22,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:30:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:30:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:30:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:30:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:30:22,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:30:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:22,200 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:30:22,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:30:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:30:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:30:22,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:22,201 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 10:30:22,201 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:22,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 10:30:22,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:22,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:22,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:22,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:22,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:22,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:22,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:22,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:22,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:22,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:30:22,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:30:22,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:30:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:30:22,609 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 10:30:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:22,987 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:30:22,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:30:22,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 10:30:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:22,988 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:30:22,989 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:30:22,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:30:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:30:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:30:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:30:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:30:22,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:30:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:22,996 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:30:22,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:30:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:30:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:30:22,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:22,997 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 10:30:22,997 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:22,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 10:30:22,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:22,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:22,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:22,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:22,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:23,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:23,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:23,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:23,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:23,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:23,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:23,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:30:23,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:30:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:30:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:30:23,749 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 10:30:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:24,299 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:30:24,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:30:24,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 10:30:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:24,300 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:30:24,300 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:30:24,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:30:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:30:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:30:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:30:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:30:24,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:30:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:24,306 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:30:24,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:30:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:30:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:30:24,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:24,307 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 10:30:24,308 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:24,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 10:30:24,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:24,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:24,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:24,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:24,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:24,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:24,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:24,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:24,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:30:24,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:24,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:24,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:24,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:30:24,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:30:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:30:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:30:24,871 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 10:30:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:25,380 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:30:25,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:30:25,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 10:30:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:25,387 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:30:25,387 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:30:25,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:30:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:30:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:30:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:30:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:30:25,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:30:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:25,392 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:30:25,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:30:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:30:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:30:25,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:25,393 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 10:30:25,393 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:25,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 10:30:25,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:25,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:25,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:25,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:26,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:26,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:26,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:26,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:26,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:26,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:30:26,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:30:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:30:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:30:26,086 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 10:30:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:26,460 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:30:26,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:30:26,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 10:30:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:26,461 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:30:26,461 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:30:26,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:30:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:30:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:30:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:30:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:30:26,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:30:26,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:26,468 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:30:26,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:30:26,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:30:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:30:26,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:26,469 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 10:30:26,469 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:26,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:26,470 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 10:30:26,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:26,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:26,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:26,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:26,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:26,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:26,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:26,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:30:26,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:26,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:26,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:26,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:30:26,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:30:26,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:30:26,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:30:26,969 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 10:30:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:27,874 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:30:27,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:30:27,875 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 10:30:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:27,875 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:30:27,875 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:30:27,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:30:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:30:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:30:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:30:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:30:27,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:30:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:27,880 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:30:27,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:30:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:30:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:30:27,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:27,881 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 10:30:27,881 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:27,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 10:30:27,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:27,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:27,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:27,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:28,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:28,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:28,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:28,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:30:28,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:28,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:28,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:28,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:30:28,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:30:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:30:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:30:28,393 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 10:30:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:28,877 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:30:28,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:30:28,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 10:30:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:28,878 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:30:28,879 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:30:28,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:30:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:30:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:30:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:30:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:30:28,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:30:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:28,885 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:30:28,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:30:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:30:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:30:28,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:28,886 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 10:30:28,886 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:28,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 10:30:28,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:28,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:28,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:28,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:28,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:29,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:29,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:29,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:29,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:29,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:29,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:30:29,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:30:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:30:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:30:29,449 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 10:30:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:29,897 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:30:29,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:30:29,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 10:30:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:29,897 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:30:29,897 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:30:29,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:30:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:30:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:30:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:30:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:30:29,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:30:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:29,902 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:30:29,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:30:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:30:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:30:29,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:29,903 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 10:30:29,903 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:29,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 10:30:29,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:29,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:29,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:29,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:29,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:30,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:30,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:30,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:30,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:30,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:30,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:30,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:30,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:30:30,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:30:30,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:30:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:30:30,599 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 10:30:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:31,075 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:30:31,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:30:31,075 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 10:30:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:31,076 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:30:31,076 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:30:31,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:30:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:30:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:30:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:30:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:30:31,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:30:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:31,082 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:30:31,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:30:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:30:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:30:31,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:31,083 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 10:30:31,083 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:31,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 10:30:31,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:31,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:31,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:31,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:31,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:31,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:31,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:31,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:31,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:30:31,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:31,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:31,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:31,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:30:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:30:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:30:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:30:31,617 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 10:30:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:32,274 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:30:32,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:30:32,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 10:30:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:32,275 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:30:32,275 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:30:32,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:30:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:30:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:30:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:30:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:30:32,280 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:30:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:32,281 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:30:32,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:30:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:30:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:30:32,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:32,282 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 10:30:32,282 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:32,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:32,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 10:30:32,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:32,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:32,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:32,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:32,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:32,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:32,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:32,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:32,917 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:32,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:32,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:32,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:32,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:30:32,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:30:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:30:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:30:32,956 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 10:30:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:33,491 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:30:33,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:30:33,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 10:30:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:33,492 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:30:33,492 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:30:33,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:30:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:30:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:30:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:30:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:30:33,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:30:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:33,498 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:30:33,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:30:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:30:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:30:33,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:33,499 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 10:30:33,499 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:33,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 10:30:33,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:33,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:33,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:34,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:34,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:34,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:34,152 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:30:34,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:34,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:34,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:34,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:30:34,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:30:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:30:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:30:34,204 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 10:30:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:34,810 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:30:34,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:30:34,810 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 10:30:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:34,811 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:30:34,811 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:30:34,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:30:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:30:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:30:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:30:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:30:34,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:30:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:34,818 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:30:34,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:30:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:30:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:30:34,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:34,818 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 10:30:34,818 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:34,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 10:30:34,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:34,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:34,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:34,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:34,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:35,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:35,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:35,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:35,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:30:35,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:35,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:35,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:35,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:30:35,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:30:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:30:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:30:35,744 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 10:30:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:36,355 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:30:36,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:30:36,355 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 10:30:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:36,356 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:30:36,356 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:30:36,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:30:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:30:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:30:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:30:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:30:36,361 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:30:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:36,362 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:30:36,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:30:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:30:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:30:36,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:36,362 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 10:30:36,363 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:36,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 10:30:36,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:36,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:36,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:36,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:36,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:37,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:37,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:37,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:37,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:37,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:37,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:30:37,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:30:37,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:30:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:30:37,907 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 10:30:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:38,612 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:30:38,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:30:38,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 10:30:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:38,613 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:30:38,614 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:30:38,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:30:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:30:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:30:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:30:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:30:38,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:30:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:38,620 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:30:38,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:30:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:30:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:30:38,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:38,620 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 10:30:38,621 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:38,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 10:30:38,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:38,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:38,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:38,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:38,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:39,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:39,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:39,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:39,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:39,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:39,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:39,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:39,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:30:39,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:30:39,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:30:39,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:30:39,404 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 10:30:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:40,118 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:30:40,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:30:40,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 10:30:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:40,119 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:30:40,120 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:30:40,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:30:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:30:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:30:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:30:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:30:40,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:30:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:40,125 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:30:40,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:30:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:30:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:30:40,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:40,126 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 10:30:40,126 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:40,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 10:30:40,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:40,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:40,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:40,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:40,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:41,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:41,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:41,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:41,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:30:41,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:41,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:41,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:41,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:30:41,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:30:41,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:30:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:30:41,189 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 10:30:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:41,894 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:30:41,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:30:41,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 10:30:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:41,895 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:30:41,895 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:30:41,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:30:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:30:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:30:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:30:41,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:30:41,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:30:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:41,900 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:30:41,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:30:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:30:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:30:41,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:41,901 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 10:30:41,901 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:41,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 10:30:41,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:41,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:41,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:41,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:41,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:42,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:42,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:42,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:42,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:42,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:42,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:42,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:42,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:30:42,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:30:42,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:30:42,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:30:42,797 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 10:30:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:43,556 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:30:43,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:30:43,557 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 10:30:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:43,557 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:30:43,558 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:30:43,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:30:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:30:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:30:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:30:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:30:43,562 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:30:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:43,562 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:30:43,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:30:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:30:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:30:43,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:43,563 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 10:30:43,563 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:43,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 10:30:43,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:43,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:43,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:43,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:43,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:44,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:44,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:44,389 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:44,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:30:44,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:44,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:44,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:44,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:30:44,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:30:44,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:30:44,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:30:44,437 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 10:30:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:45,252 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:30:45,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:30:45,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 10:30:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:45,253 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:30:45,253 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:30:45,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:30:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:30:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:30:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:30:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:30:45,257 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:30:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:45,257 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:30:45,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:30:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:30:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:30:45,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:45,258 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 10:30:45,258 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:45,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 10:30:45,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:45,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:45,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:45,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:45,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:46,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:46,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:46,399 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:46,418 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:30:46,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:46,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:46,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:46,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:30:46,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:30:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:30:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:30:46,459 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 10:30:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:47,352 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:30:47,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:30:47,353 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 10:30:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:47,354 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:30:47,354 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:30:47,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:30:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:30:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:30:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:30:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:30:47,358 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:30:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:47,358 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:30:47,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:30:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:30:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:30:47,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:47,359 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 10:30:47,359 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:47,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 10:30:47,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:47,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:47,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:47,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:47,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:48,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:48,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:48,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:48,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:48,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:48,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:30:48,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:30:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:30:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:30:48,790 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 10:30:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:49,685 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:30:49,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:30:49,686 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 10:30:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:49,686 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:30:49,686 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:30:49,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:30:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:30:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:30:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:30:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:30:49,691 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:30:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:49,691 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:30:49,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:30:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:30:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:30:49,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:49,692 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 10:30:49,692 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:49,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 10:30:49,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:49,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:49,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:49,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:30:49,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:51,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:51,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:51,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:30:51,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:30:51,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:51,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:51,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:51,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:30:51,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:30:51,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:30:51,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:30:51,104 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 10:30:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:52,045 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:30:52,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:30:52,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 10:30:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:52,047 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:30:52,047 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:30:52,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:30:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:30:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:30:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:30:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:30:52,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:30:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:52,051 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:30:52,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:30:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:30:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:30:52,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:52,052 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 10:30:52,052 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:52,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:52,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 10:30:52,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:52,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:52,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:52,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:52,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:53,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:53,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:53,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:30:53,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:30:53,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:53,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:53,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:53,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:30:53,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:30:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:30:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:30:53,120 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 10:30:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:54,176 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:30:54,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:30:54,176 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 10:30:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:54,177 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:30:54,177 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:30:54,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:30:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:30:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:30:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:30:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:30:54,181 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:30:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:54,182 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:30:54,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:30:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:30:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:30:54,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:54,182 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 10:30:54,182 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:54,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 10:30:54,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:54,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:54,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:54,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:54,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:55,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:55,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:55,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:30:55,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:30:55,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:55,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:55,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:55,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:30:55,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:30:55,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:30:55,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:30:55,165 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 10:30:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:56,392 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:30:56,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:30:56,393 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 10:30:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:56,393 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:30:56,394 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:30:56,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:30:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:30:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:30:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:30:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:30:56,398 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:30:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:56,398 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:30:56,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:30:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:30:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:30:56,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:56,399 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 10:30:56,399 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:56,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 10:30:56,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:56,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:56,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:56,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:56,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:57,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:57,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:57,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:30:57,446 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:30:57,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:57,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:57,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:57,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:30:57,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:30:57,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:30:57,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:30:57,481 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 10:30:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:30:58,584 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:30:58,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:30:58,585 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 10:30:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:30:58,585 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:30:58,586 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:30:58,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:30:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:30:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:30:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:30:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:30:58,590 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:30:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:30:58,590 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:30:58,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:30:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:30:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:30:58,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:30:58,591 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 10:30:58,591 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:30:58,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:30:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 10:30:58,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:30:58,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:30:58,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:58,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:30:58,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:30:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:30:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:59,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:30:59,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:30:59,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:30:59,662 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:30:59,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:30:59,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:30:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:30:59,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:30:59,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:30:59,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:30:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:30:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:30:59,699 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 10:31:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:00,976 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:31:00,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:31:00,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 10:31:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:00,978 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:31:00,978 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:31:00,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:31:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:31:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:31:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:31:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:31:00,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:31:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:00,982 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:31:00,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:31:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:31:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:31:00,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:00,983 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 10:31:00,983 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:00,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 10:31:00,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:00,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:00,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:02,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:02,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:02,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:02,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:02,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:02,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:31:02,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:31:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:31:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:31:02,290 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 10:31:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:03,455 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:31:03,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:31:03,456 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 10:31:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:03,456 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:31:03,457 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:31:03,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:31:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:31:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:31:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:31:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:31:03,461 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:31:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:03,461 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:31:03,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:31:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:31:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:31:03,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:03,461 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-30 10:31:03,462 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:03,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-30 10:31:03,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:03,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:03,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:03,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:03,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:04,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:04,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:04,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:04,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:04,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:04,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:04,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:04,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:31:04,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:31:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:31:04,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:31:04,702 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 10:31:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:06,081 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:31:06,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:31:06,081 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 10:31:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:06,082 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:31:06,082 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:31:06,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:31:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:31:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:31:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:31:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:31:06,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:31:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:06,086 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:31:06,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:31:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:31:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:31:06,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:06,087 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-30 10:31:06,087 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:06,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-30 10:31:06,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:06,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:06,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:06,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:06,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:07,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:07,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:07,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:07,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:31:07,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:07,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:07,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:07,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:31:07,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:31:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:31:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:31:07,284 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 10:31:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:08,733 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:31:08,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:31:08,734 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 10:31:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:08,735 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:31:08,735 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:31:08,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:31:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:31:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:31:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:31:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:31:08,739 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:31:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:08,740 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:31:08,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:31:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:31:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:31:08,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:08,740 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-30 10:31:08,741 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:08,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-30 10:31:08,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:08,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:08,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:08,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:08,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:09,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:09,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:09,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:09,956 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:09,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:09,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:09,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:09,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:31:09,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:31:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:31:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:31:09,991 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 10:31:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:11,545 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:31:11,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:31:11,545 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 10:31:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:11,546 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:31:11,546 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:31:11,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:31:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:31:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:31:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:31:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:31:11,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:31:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:11,551 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:31:11,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:31:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:31:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:31:11,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:11,551 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-30 10:31:11,551 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:11,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-30 10:31:11,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:11,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:11,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:11,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:11,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:12,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:12,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:12,884 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:31:12,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:12,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:12,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:31:12,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:31:12,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:31:12,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:31:12,919 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 10:31:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:14,341 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:31:14,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:31:14,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 10:31:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:14,342 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:31:14,342 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:31:14,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:31:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:31:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:31:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:31:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:31:14,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:31:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:14,347 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:31:14,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:31:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:31:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:31:14,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:14,347 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-30 10:31:14,347 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:14,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-30 10:31:14,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:14,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:14,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:14,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:15,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:15,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:15,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:31:15,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:16,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:16,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:31:16,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:31:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:31:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:31:16,045 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 10:31:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:17,682 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:31:17,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:31:17,682 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 10:31:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:17,683 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:31:17,683 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:31:17,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:31:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:31:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:31:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:31:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:31:17,689 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:31:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:17,689 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:31:17,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:31:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:31:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:31:17,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:17,690 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-30 10:31:17,690 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:17,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-30 10:31:17,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:17,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:17,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:17,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:18,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:18,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:19,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:19,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:31:19,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:31:19,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:31:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:31:19,055 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 10:31:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:20,567 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:31:20,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:31:20,567 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 10:31:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:20,568 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:31:20,568 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:31:20,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:31:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:31:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:31:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:31:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:31:20,572 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:31:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:20,572 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:31:20,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:31:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:31:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:31:20,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:20,573 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-30 10:31:20,573 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:20,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-30 10:31:20,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:20,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:20,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:20,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:22,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:22,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:22,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:22,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:22,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:22,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:22,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:22,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:31:22,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:31:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:31:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:31:22,679 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 10:31:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:24,279 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:31:24,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:31:24,279 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 10:31:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:24,280 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:31:24,281 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:31:24,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:31:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:31:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:31:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:31:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:31:24,285 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:31:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:24,285 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:31:24,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:31:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:31:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:31:24,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:24,286 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-30 10:31:24,286 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:24,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:24,286 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-30 10:31:24,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:24,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:24,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:24,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:24,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:27,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:27,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:27,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:27,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:31:27,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:27,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:27,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:27,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:31:27,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:31:27,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:31:27,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:31:27,099 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 10:31:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:28,796 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:31:28,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:31:28,797 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 10:31:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:28,797 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:31:28,797 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:31:28,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:31:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:31:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:31:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:31:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:31:28,802 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:31:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:28,802 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:31:28,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:31:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:31:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:31:28,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:28,803 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-30 10:31:28,803 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:28,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-30 10:31:28,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:28,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:28,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:28,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:28,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:30,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:30,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:30,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:30,198 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:30,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:30,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:30,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:30,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:31:30,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:31:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:31:30,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:31:30,234 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 10:31:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:32,055 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:31:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:31:32,055 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 10:31:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:32,056 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:31:32,056 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:31:32,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:31:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:31:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:31:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:31:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:31:32,062 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:31:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:32,062 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:31:32,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:31:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:31:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:31:32,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:32,063 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-30 10:31:32,063 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:32,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-30 10:31:32,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:32,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:32,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:32,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:32,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:33,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:33,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:33,575 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:33,605 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:31:33,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:33,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:33,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:33,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:31:33,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:31:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:31:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:33,641 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 10:31:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:35,388 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:31:35,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:31:35,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 10:31:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:35,390 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:31:35,390 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:31:35,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:31:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:31:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:31:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:31:35,395 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:31:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:35,395 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:31:35,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:31:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:31:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:31:35,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:35,396 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-30 10:31:35,396 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:35,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:35,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-30 10:31:35,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:35,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:35,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:35,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:37,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:37,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:37,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:37,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:31:37,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:37,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:37,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:37,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:31:37,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:31:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:31:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:31:37,203 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 10:31:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:39,054 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:31:39,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:31:39,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 10:31:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:39,055 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:31:39,055 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:31:39,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:31:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:31:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:31:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:31:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:31:39,059 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:31:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:39,059 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:31:39,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:31:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:31:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:31:39,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:39,060 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-30 10:31:39,060 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:39,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-30 10:31:39,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:39,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:39,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:39,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:41,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:41,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:41,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:41,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:41,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:41,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:31:41,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:31:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:31:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:41,222 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 10:31:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:43,300 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:31:43,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:31:43,300 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 10:31:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:43,301 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:31:43,301 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:31:43,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:31:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:31:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:31:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:31:43,306 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:31:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:43,306 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:31:43,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:31:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:31:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:31:43,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:43,307 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-30 10:31:43,307 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:43,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-30 10:31:43,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:43,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:43,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:43,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:43,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:44,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:44,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:44,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:45,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:45,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:45,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:45,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:45,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:31:45,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:31:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:31:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:31:45,041 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 10:31:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:47,214 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:31:47,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:31:47,214 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 10:31:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:47,215 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:31:47,216 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:31:47,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:31:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:31:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:31:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:31:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:31:47,221 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:31:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:31:47,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:31:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:31:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:31:47,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:47,222 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-30 10:31:47,222 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:47,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-30 10:31:47,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:47,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:47,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:47,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:48,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:48,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:48,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:48,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:31:48,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:48,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:48,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:48,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:31:48,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:31:48,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:31:48,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:31:48,919 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 10:31:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,962 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:31:50,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:31:50,963 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 10:31:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,964 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:31:50,964 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:31:50,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:31:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:31:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:31:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:31:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:31:50,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:31:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,970 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:31:50,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:31:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:31:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:31:50,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,970 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-30 10:31:50,971 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-30 10:31:50,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:53,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:53,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:53,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:53,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:53,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:53,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:31:53,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:31:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:31:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:31:53,167 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 10:31:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:55,273 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:31:55,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:31:55,273 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 10:31:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:55,274 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:31:55,274 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:31:55,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:31:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:31:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:31:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:31:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:31:55,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:31:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:55,280 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:31:55,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:31:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:31:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:31:55,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:55,281 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-30 10:31:55,281 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:55,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-30 10:31:55,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:55,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:57,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:57,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:57,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:57,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:31:57,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:57,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:57,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:57,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:31:57,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:31:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:31:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:31:57,858 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 10:32:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:01,408 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:32:01,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:32:01,408 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 10:32:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:01,409 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:32:01,409 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:32:01,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:32:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:32:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:32:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:32:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:32:01,414 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:32:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:01,414 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:32:01,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:32:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:32:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:32:01,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:01,415 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-30 10:32:01,415 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:01,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-30 10:32:01,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:01,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:01,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:01,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:03,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:03,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:03,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:03,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:32:03,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:03,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:03,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:03,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:32:03,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:32:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:32:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:32:03,654 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 10:32:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:05,876 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:32:05,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:32:05,876 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 10:32:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:05,877 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:32:05,877 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:32:05,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:32:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:32:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:32:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:32:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:32:05,882 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:32:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:05,882 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:32:05,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:32:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:32:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:32:05,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:05,882 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-30 10:32:05,882 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:05,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-30 10:32:05,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:05,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:05,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:08,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:08,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:08,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:32:08,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:32:08,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:32:08,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:08,085 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 10:32:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:10,429 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:32:10,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:32:10,430 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 10:32:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:10,430 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:32:10,431 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:32:10,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:32:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:32:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:32:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:32:10,435 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:32:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:10,435 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:32:10,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:32:10,435 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:32:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:32:10,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:10,436 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-30 10:32:10,436 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:10,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-30 10:32:10,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:10,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:10,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:10,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:10,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:12,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:12,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:12,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:12,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:12,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:12,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:12,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:12,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:32:12,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:32:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:32:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:32:12,724 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 10:32:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:15,187 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:32:15,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:32:15,187 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 10:32:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:15,188 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:32:15,188 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:32:15,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:32:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:32:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:32:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:32:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:32:15,193 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:32:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:15,194 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:32:15,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:32:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:32:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:32:15,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:15,194 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-30 10:32:15,195 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:15,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-30 10:32:15,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:15,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:17,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:17,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:17,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:17,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:32:17,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:17,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:17,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:17,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:32:17,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:32:17,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:32:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:17,209 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 10:32:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:19,851 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:32:19,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:32:19,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 10:32:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:19,852 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:32:19,852 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:32:19,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:32:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:32:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:32:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:32:19,857 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:32:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:19,857 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:32:19,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:32:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:32:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:32:19,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:19,858 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-30 10:32:19,858 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:19,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-30 10:32:19,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:19,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:19,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:19,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:19,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:21,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:21,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:21,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:21,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:21,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:21,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:21,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:21,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:32:21,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:32:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:32:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:32:21,952 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 10:32:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,672 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:32:24,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:32:24,673 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 10:32:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,674 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:32:24,674 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:32:24,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:32:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:32:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:32:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:32:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:32:24,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:32:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,677 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:32:24,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:32:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:32:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:32:24,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,678 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-30 10:32:24,679 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-30 10:32:24,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:26,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:26,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:26,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:32:26,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:26,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:32:26,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:32:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:32:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:26,913 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 10:32:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:29,706 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:32:29,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:32:29,706 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 10:32:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:29,707 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:32:29,708 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:32:29,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:32:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:32:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:32:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:32:29,713 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:32:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:29,713 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:32:29,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:32:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:32:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:32:29,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:29,714 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-30 10:32:29,714 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:29,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-30 10:32:29,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:29,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:29,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:29,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:29,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:32,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:32,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:32,160 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:32,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:32:32,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:32,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:32,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:32,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:32:32,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:32:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:32:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:32:32,249 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 10:32:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:35,197 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:32:35,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:32:35,197 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 10:32:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:35,198 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:32:35,198 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:32:35,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:32:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:32:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:32:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:32:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:32:35,202 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:32:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:35,203 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:32:35,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:32:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:32:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:32:35,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:35,203 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-30 10:32:35,204 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:35,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-30 10:32:35,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:35,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:37,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:37,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:37,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:37,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:37,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:37,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:32:37,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:32:37,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:32:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:37,499 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 10:32:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:40,455 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:32:40,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:32:40,456 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 10:32:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:40,457 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:32:40,457 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:32:40,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:32:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:32:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:32:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:32:40,461 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:32:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:40,461 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:32:40,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:32:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:32:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:32:40,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:40,461 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-30 10:32:40,462 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:40,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-30 10:32:40,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:40,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:40,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:40,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:40,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:42,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:42,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:42,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:42,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:42,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:42,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:42,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:42,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:32:42,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:32:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:32:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:32:42,831 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 10:32:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:45,865 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:32:45,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:32:45,866 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 10:32:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:45,867 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:32:45,867 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:32:45,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:32:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:32:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:32:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:32:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:32:45,871 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:32:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:45,871 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:32:45,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:32:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:32:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:32:45,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:45,872 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-30 10:32:45,872 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:45,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-30 10:32:45,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:45,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:45,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:45,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:48,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:48,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:48,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:48,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:32:48,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:48,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:48,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:48,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:32:48,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:32:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:32:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:32:48,424 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 10:32:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:51,500 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:32:51,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:32:51,501 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 10:32:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:51,501 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:32:51,501 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:32:51,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:32:51,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:32:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:32:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:32:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:32:51,506 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:32:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:51,507 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:32:51,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:32:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:32:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:32:51,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:51,507 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-30 10:32:51,508 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:51,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-30 10:32:51,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:51,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:54,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:54,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:54,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:54,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:54,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:54,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:54,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:54,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:32:54,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:32:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:32:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:32:54,273 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 10:32:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:58,319 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:32:58,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:32:58,320 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 10:32:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:58,321 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:32:58,321 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:32:58,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:32:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:32:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:32:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:32:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:32:58,326 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:32:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:58,327 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:32:58,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:32:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:32:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:32:58,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:58,328 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-30 10:32:58,328 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:58,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-30 10:32:58,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:58,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:58,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:58,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:01,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:01,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:01,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:01,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:33:01,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:01,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:01,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:01,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:33:01,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:33:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:33:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:33:01,551 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 10:33:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:04,901 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:33:04,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:33:04,901 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 10:33:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:04,902 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:33:04,902 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:33:04,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:33:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:33:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:33:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:33:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:33:04,908 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:33:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:04,908 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:33:04,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:33:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:33:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:33:04,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:04,909 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-30 10:33:04,909 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:04,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-30 10:33:04,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:04,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:04,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:04,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:09,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:09,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:09,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:09,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:33:09,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:09,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:09,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:09,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:33:09,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:33:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:33:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:33:09,539 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 10:33:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:12,809 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:33:12,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:33:12,810 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 10:33:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:12,811 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:33:12,811 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:33:12,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:33:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:33:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:33:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:33:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:33:12,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:33:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:12,816 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:33:12,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:33:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:33:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:33:12,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:12,817 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-30 10:33:12,817 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:12,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-30 10:33:12,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:12,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:12,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:12,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:15,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:15,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:15,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:15,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:15,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:33:15,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:33:15,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:33:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:33:15,883 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 10:33:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:19,445 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:33:19,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:33:19,445 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 10:33:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:19,446 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:33:19,446 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:33:19,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:33:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:33:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:33:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:33:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:33:19,452 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:33:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:19,452 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:33:19,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:33:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:33:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:33:19,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:19,453 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-30 10:33:19,453 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:19,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-30 10:33:19,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:19,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:19,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:19,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:23,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:23,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:23,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:33:23,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:33:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:33:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:33:23,643 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 10:33:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:27,213 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:33:27,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:33:27,213 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 10:33:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:27,214 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:33:27,214 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:33:27,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:33:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:33:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:33:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:33:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:33:27,219 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:33:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:27,219 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:33:27,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:33:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:33:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:33:27,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:27,220 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-30 10:33:27,220 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:27,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-30 10:33:27,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:27,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:27,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:27,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:30,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:30,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:33:30,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:33:30,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:33:30,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:33:30,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:33:30,218 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 10:33:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,819 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:33:33,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:33:33,820 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 10:33:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,821 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:33:33,821 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:33:33,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:33:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:33:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:33:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:33:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:33:33,825 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:33:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,825 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:33:33,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:33:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:33:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:33:33,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,826 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-30 10:33:33,826 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-30 10:33:33,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:33,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:37,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:37,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:37,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:37,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:37,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:37,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:33:37,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:33:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:33:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:33:37,385 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 10:33:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:41,242 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:33:41,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:33:41,242 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 10:33:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:41,243 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:33:41,243 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:33:41,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:33:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:33:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:33:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:33:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:33:41,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:33:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:41,249 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:33:41,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:33:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:33:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:33:41,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:41,249 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-30 10:33:41,249 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:41,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:41,250 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-30 10:33:41,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:41,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:41,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:41,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:44,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:44,077 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:44,117 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:33:44,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:44,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:44,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:44,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:33:44,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:33:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:33:44,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:33:44,225 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 10:33:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:48,191 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:33:48,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:33:48,191 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 10:33:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:48,192 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:33:48,193 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:33:48,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:33:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:33:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:33:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:33:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:33:48,198 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:33:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:48,198 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:33:48,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:33:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:33:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:33:48,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:48,199 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-30 10:33:48,199 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:48,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-30 10:33:48,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:48,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:48,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:48,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:51,620 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:51,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:33:51,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:51,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:51,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:33:51,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:33:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:33:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:33:51,748 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-30 10:33:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:55,827 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:33:55,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:33:55,827 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-30 10:33:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:55,828 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:33:55,828 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:33:55,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:33:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:33:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:33:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:33:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:33:55,832 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:33:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,833 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:33:55,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:33:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:33:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:33:55,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,833 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-30 10:33:55,833 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-30 10:33:55,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:58,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:58,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:33:58,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:33:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:33:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:33:58,896 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 10:34:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:03,011 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:34:03,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:34:03,011 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 10:34:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:03,012 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:34:03,012 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:34:03,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:34:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:34:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:34:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:34:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:34:03,017 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:34:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:03,017 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:34:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:34:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:34:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:34:03,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:03,018 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-30 10:34:03,019 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:03,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-30 10:34:03,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:03,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:07,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:07,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:07,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:07,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:34:07,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:34:07,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:34:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:34:07,620 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-30 10:34:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:11,850 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:34:11,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:34:11,851 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-30 10:34:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:11,852 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:34:11,852 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:34:11,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:34:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:34:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:34:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:34:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:34:11,856 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:34:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:11,856 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:34:11,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:34:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:34:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:34:11,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:11,857 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-30 10:34:11,857 INFO L423 AbstractCegarLoop]: === Iteration 82 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:11,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-30 10:34:11,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:11,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:11,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:11,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:15,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:15,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:15,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:34:15,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:15,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:34:15,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:34:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:34:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:34:15,183 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. Received shutdown request... [2018-09-30 10:34:16,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:34:16,067 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:34:16,073 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:34:16,073 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:34:16 BoogieIcfgContainer [2018-09-30 10:34:16,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:34:16,074 INFO L168 Benchmark]: Toolchain (without parser) took 243864.13 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -119.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 217.6 MB). Peak memory consumption was 98.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:16,076 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:16,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:16,077 INFO L168 Benchmark]: Boogie Preprocessor took 25.13 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:16,077 INFO L168 Benchmark]: RCFGBuilder took 226.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:16,078 INFO L168 Benchmark]: TraceAbstraction took 243560.93 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -119.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 196.5 MB). Peak memory consumption was 76.9 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:16,085 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 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.13 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 226.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243560.93 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -119.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 196.5 MB). Peak memory consumption was 76.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was constructing difference of abstraction (84states) and FLOYD_HOARE automaton (currently 3 states, 84 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 243.4s OverallTime, 82 OverallIterations, 81 TraceHistogramMax, 121.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 164 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 187166 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6805 GetRequests, 3321 SyntacticMatches, 81 SemanticMatches, 3403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 115.4s InterpolantComputationTime, 6968 NumberOfCodeBlocks, 6968 NumberOfCodeBlocksAsserted, 1024 NumberOfCheckSat, 6805 ConstructedInterpolants, 0 QuantifiedInterpolants, 2620303 SizeOfPredicates, 0 NumberOfNonLiveVariables, 7047 ConjunctsInSsa, 6885 ConjunctsInUnsatCore, 163 InterpolantComputations, 1 PerfectInterpolantSequences, 0/183762 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-34-16-101.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-34-16-101.csv Completed graceful shutdown