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-b2fde6a [2018-09-28 10:11:25,937 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:11:25,939 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:11:25,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:11:25,958 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:11:25,959 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:11:25,961 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:11:25,963 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:11:25,967 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:11:25,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:11:25,970 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:11:25,970 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:11:25,971 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:11:25,972 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:11:25,980 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:11:25,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:11:25,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:11:25,987 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:11:25,989 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:11:25,990 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:11:25,991 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:11:25,992 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:11:25,994 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:11:26,005 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 [2018-09-28 10:11:26,032 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:11:26,033 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:11:26,034 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:11:26,034 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:11:26,035 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:11:26,035 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:11:26,035 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:11:26,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:11:26,036 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:11:26,036 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:11:26,036 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:11:26,041 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:11:26,041 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:11:26,042 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:11:26,042 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:11:26,042 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:11:26,042 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:11:26,042 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:11:26,043 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:11:26,043 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:11:26,043 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:11:26,043 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:11:26,043 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:11:26,044 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:11:26,044 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:11:26,044 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:11:26,044 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:11:26,045 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:11:26,045 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:11:26,045 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:11:26,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:11:26,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:11:26,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:11:26,143 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:11:26,144 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:11:26,145 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-28 10:11:26,145 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-28 10:11:26,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:11:26,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:11:26,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:11:26,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:11:26,203 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:11:26,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,246 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:11:26,246 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:11:26,247 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:11:26,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:11:26,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:11:26,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:11:26,250 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:11:26,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/1) ... [2018-09-28 10:11:26,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:11:26,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:11:26,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:11:26,278 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:11:26,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (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 [2018-09-28 10:11:26,356 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-28 10:11:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-28 10:11:26,518 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:11:26,518 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:11:26 BoogieIcfgContainer [2018-09-28 10:11:26,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:11:26,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:11:26,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:11:26,523 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:11:26,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:11:26" (1/2) ... [2018-09-28 10:11:26,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697eeb9d and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:11:26, skipping insertion in model container [2018-09-28 10:11:26,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:11:26" (2/2) ... [2018-09-28 10:11:26,527 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-28 10:11:26,536 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:11:26,544 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:11:26,590 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:11:26,590 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:11:26,591 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:11:26,591 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:11:26,591 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:11:26,591 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:11:26,591 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:11:26,591 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:11:26,591 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:11:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-28 10:11:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-28 10:11:26,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:26,612 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-28 10:11:26,613 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:26,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-28 10:11:26,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:26,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:26,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:26,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:26,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:26,809 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:11:26,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:11:26,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:11:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:11:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:11:26,830 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-28 10:11:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:26,879 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:11:26,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:11:26,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-28 10:11:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:26,903 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:11:26,904 INFO L226 Difference]: Without dead ends: 4 [2018-09-28 10:11:26,916 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 [2018-09-28 10:11:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-28 10:11:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-28 10:11:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-28 10:11:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-28 10:11:26,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-28 10:11:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:26,998 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-28 10:11:26,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:11:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-28 10:11:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:11:26,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:26,999 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:11:26,999 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:27,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-28 10:11:27,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:27,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:27,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:27,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:27,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:27,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:27,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:27,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:27,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:27,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-28 10:11:27,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:11:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:11:27,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:11:27,245 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-28 10:11:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:27,354 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-28 10:11:27,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:11:27,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-28 10:11:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:27,355 INFO L225 Difference]: With dead ends: 6 [2018-09-28 10:11:27,356 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:11:27,357 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 [2018-09-28 10:11:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:11:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:11:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:11:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:11:27,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:11:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:27,360 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:11:27,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:11:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:11:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:11:27,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:27,361 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-28 10:11:27,361 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:27,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-28 10:11:27,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:27,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:27,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:27,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:27,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:27,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:11:27,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:27,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:27,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:27,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:27,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:27,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:11:27,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:11:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:11:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:11:27,589 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-28 10:11:27,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:27,622 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-28 10:11:27,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:11:27,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 10:11:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:27,623 INFO L225 Difference]: With dead ends: 7 [2018-09-28 10:11:27,623 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:11:27,623 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 [2018-09-28 10:11:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:11:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:11:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:11:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:11:27,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:11:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:27,627 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:11:27,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:11:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:11:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:11:27,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:27,628 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-28 10:11:27,629 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:27,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-28 10:11:27,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:27,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:27,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:27,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:27,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:27,932 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 [2018-09-28 10:11:27,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:27,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:11:27,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:27,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:28,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:28,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:11:28,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:11:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:11:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:11:28,032 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-28 10:11:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:28,131 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:11:28,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:11:28,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 10:11:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:28,134 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:11:28,135 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:11:28,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:11:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:11:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:11:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:11:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:11:28,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:11:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:28,141 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:11:28,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:11:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:11:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:11:28,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:28,143 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-28 10:11:28,143 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:28,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-28 10:11:28,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:28,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:28,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:28,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:28,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:28,305 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 [2018-09-28 10:11:28,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:28,327 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:28,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:28,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:28,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:28,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:11:28,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:11:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:11:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:11:28,361 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-28 10:11:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:28,516 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:11:28,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:11:28,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-28 10:11:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:28,518 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:11:28,519 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:11:28,519 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 [2018-09-28 10:11:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:11:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:11:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:11:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:11:28,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:11:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:28,524 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:11:28,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:11:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:11:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:11:28,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:28,525 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-28 10:11:28,525 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:28,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-28 10:11:28,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:28,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:28,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:28,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:28,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:28,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:28,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:28,694 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:11:28,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:28,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:28,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:28,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:11:28,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:11:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:11:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:11:28,726 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-28 10:11:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:28,824 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:11:28,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:11:28,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-28 10:11:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:28,825 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:11:28,826 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:11:28,827 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 [2018-09-28 10:11:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:11:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:11:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:11:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:11:28,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:11:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:28,831 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:11:28,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:11:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:11:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:11:28,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:28,831 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-28 10:11:28,832 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:28,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:28,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-28 10:11:28,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:28,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:28,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:28,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:29,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:29,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:29,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:29,388 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:11:29,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:29,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:29,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:29,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:11:29,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:11:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:11:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:11:29,425 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-28 10:11:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:29,537 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:11:29,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:11:29,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-28 10:11:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:29,538 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:11:29,538 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:11:29,539 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 [2018-09-28 10:11:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:11:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:11:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:11:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:11:29,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:11:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:29,543 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:11:29,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:11:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:11:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:11:29,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:29,544 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-28 10:11:29,544 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:29,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-28 10:11:29,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:29,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:29,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:29,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:29,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:29,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:29,702 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 [2018-09-28 10:11:29,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:29,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:29,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:29,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:11:29,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:11:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:11:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:11:29,754 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-28 10:11:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:29,865 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:11:29,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:11:29,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-28 10:11:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:29,866 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:11:29,866 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:11:29,867 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 [2018-09-28 10:11:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:11:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:11:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:11:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:11:29,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:11:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:29,872 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:11:29,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:11:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:11:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:11:29,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:29,873 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-28 10:11:29,873 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:29,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-28 10:11:29,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:29,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:29,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:30,091 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 [2018-09-28 10:11:30,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:30,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:30,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:30,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:30,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:11:30,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:11:30,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:11:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:11:30,165 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-28 10:11:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:30,264 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:11:30,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:11:30,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-28 10:11:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:30,266 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:11:30,266 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:11:30,267 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 [2018-09-28 10:11:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:11:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:11:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:11:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:11:30,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:11:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:30,271 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:11:30,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:11:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:11:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:11:30,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:30,272 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-28 10:11:30,272 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:30,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-28 10:11:30,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:30,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:30,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:30,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:30,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:30,533 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 [2018-09-28 10:11:30,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:30,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:11:30,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:30,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:30,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:11:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:11:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:11:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:11:30,604 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-28 10:11:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:30,711 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:11:30,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:11:30,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-28 10:11:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:30,713 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:11:30,713 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:11:30,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:11:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:11:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:11:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:11:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:11:30,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:11:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:30,719 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:11:30,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:11:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:11:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:11:30,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:30,720 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-28 10:11:30,720 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:30,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-28 10:11:30,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:30,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:30,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:30,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:30,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:30,894 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 [2018-09-28 10:11:30,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:30,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:30,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:30,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:30,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:30,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:11:30,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:11:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:11:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:11:30,953 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-28 10:11:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:31,078 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:11:31,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:11:31,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-28 10:11:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:31,079 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:11:31,080 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:11:31,080 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 [2018-09-28 10:11:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:11:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:11:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:11:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:11:31,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:11:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:31,085 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:11:31,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:11:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:11:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:11:31,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:31,086 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-28 10:11:31,086 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:31,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-28 10:11:31,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:31,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:31,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:31,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:31,300 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 [2018-09-28 10:11:31,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:31,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:11:31,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:31,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:31,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:11:31,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:11:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:11:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:11:31,366 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-28 10:11:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:31,571 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:11:31,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:11:31,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-28 10:11:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:31,573 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:11:31,573 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:11:31,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:11:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:11:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:11:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:11:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:11:31,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:11:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:31,578 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:11:31,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:11:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:11:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:11:31,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:31,579 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-28 10:11:31,579 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:31,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-28 10:11:31,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:31,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:31,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:31,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:31,856 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 [2018-09-28 10:11:31,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:31,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:11:31,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:31,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:31,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:31,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:11:31,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:11:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:11:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:11:31,909 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-28 10:11:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:32,150 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:11:32,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:11:32,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-28 10:11:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:32,151 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:11:32,152 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:11:32,152 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 [2018-09-28 10:11:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:11:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:11:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:11:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:11:32,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:11:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:32,157 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:11:32,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:11:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:11:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:11:32,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:32,158 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-28 10:11:32,158 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:32,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:32,158 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-28 10:11:32,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:32,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:32,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:32,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:32,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:32,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:32,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:32,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:32,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:32,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:11:32,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:11:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:11:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:11:32,667 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-28 10:11:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:32,917 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:11:32,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:11:32,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-28 10:11:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:32,918 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:11:32,918 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:11:32,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:11:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:11:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:11:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:11:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:11:32,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:11:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:32,924 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:11:32,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:11:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:11:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:11:32,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:32,925 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-28 10:11:32,925 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:32,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:32,926 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-28 10:11:32,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:32,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:32,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:32,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:33,216 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 [2018-09-28 10:11:33,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:33,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:33,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:33,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:33,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:11:33,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:11:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:11:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:11:33,286 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-28 10:11:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:33,646 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:11:33,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:11:33,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-28 10:11:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:33,647 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:11:33,647 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:11:33,648 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 [2018-09-28 10:11:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:11:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:11:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:11:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:11:33,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:11:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:33,654 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:11:33,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:11:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:11:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:11:33,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:33,655 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-28 10:11:33,656 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:33,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:33,656 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-28 10:11:33,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:33,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:33,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:33,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:33,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:33,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:33,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:34,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:11:34,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:34,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:34,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:11:34,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:11:34,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:11:34,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:11:34,039 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-28 10:11:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:34,235 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:11:34,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:11:34,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-28 10:11:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:34,236 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:11:34,236 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:11:34,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:11:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:11:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:11:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:11:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:11:34,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:11:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:34,241 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:11:34,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:11:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:11:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:11:34,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:34,242 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-28 10:11:34,242 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:34,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-28 10:11:34,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:34,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:34,583 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 [2018-09-28 10:11:34,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:34,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:34,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:34,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:34,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:34,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:11:34,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:11:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:11:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:11:34,628 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-28 10:11:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:34,867 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:11:34,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:11:34,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-28 10:11:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:34,868 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:11:34,868 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:11:34,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:11:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:11:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:11:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:11:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:11:34,873 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:11:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:34,873 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:11:34,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:11:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:11:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:11:34,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:34,874 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-28 10:11:34,875 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:34,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-28 10:11:34,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:34,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:34,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:34,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:35,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:35,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:35,273 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:35,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:11:35,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:35,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:35,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:35,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:11:35,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:11:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:11:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:11:35,321 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-28 10:11:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:35,609 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:11:35,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:11:35,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-28 10:11:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:35,610 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:11:35,610 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:11:35,611 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 [2018-09-28 10:11:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:11:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:11:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:11:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:11:35,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:11:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:35,616 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:11:35,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:11:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:11:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:11:35,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:35,617 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-28 10:11:35,617 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:35,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-28 10:11:35,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:35,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:35,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:36,040 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 [2018-09-28 10:11:36,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:36,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:11:36,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:36,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:36,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:11:36,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:11:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:11:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:11:36,128 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-28 10:11:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:36,445 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:11:36,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:11:36,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-28 10:11:36,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:36,447 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:11:36,447 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:11:36,448 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 [2018-09-28 10:11:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:11:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:11:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:11:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:11:36,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:11:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:36,453 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:11:36,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:11:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:11:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:11:36,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:36,454 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-28 10:11:36,455 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:36,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-28 10:11:36,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:36,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:36,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:36,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:36,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:36,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:36,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:36,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:11:36,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:11:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:11:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:11:36,835 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-28 10:11:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:37,198 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:11:37,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:11:37,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-28 10:11:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:37,199 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:11:37,199 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:11:37,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:11:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:11:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:11:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:11:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:11:37,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:11:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:37,206 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:11:37,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:11:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:11:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:11:37,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:37,207 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-28 10:11:37,207 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:37,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:37,207 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-28 10:11:37,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:37,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:37,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:37,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:37,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:37,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:37,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:37,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:37,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:37,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:37,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:37,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:11:37,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:11:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:11:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:11:37,936 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-28 10:11:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:38,287 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:11:38,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:11:38,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-28 10:11:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:38,289 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:11:38,289 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:11:38,290 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 [2018-09-28 10:11:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:11:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:11:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:11:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:11:38,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:11:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:38,294 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:11:38,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:11:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:11:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:11:38,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:38,295 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-28 10:11:38,296 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:38,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-28 10:11:38,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:38,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:38,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:38,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:38,723 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 [2018-09-28 10:11:38,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:38,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:11:38,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:38,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:38,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:38,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:11:38,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:11:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:11:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:11:38,785 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-28 10:11:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:39,168 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:11:39,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:11:39,171 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-28 10:11:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:39,171 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:11:39,171 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:11:39,172 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 [2018-09-28 10:11:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:11:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:11:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:11:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:11:39,175 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:11:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:39,175 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:11:39,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:11:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:11:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:11:39,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:39,176 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-28 10:11:39,177 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:39,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-28 10:11:39,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:39,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:39,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:39,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:39,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:39,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:39,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:39,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:39,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:39,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:39,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:39,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:39,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:11:39,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:11:39,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:11:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:11:39,842 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-28 10:11:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:40,347 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:11:40,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:11:40,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-28 10:11:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:40,348 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:11:40,348 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:11:40,349 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 [2018-09-28 10:11:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:11:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:11:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:11:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:11:40,354 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:11:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:40,354 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:11:40,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:11:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:11:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:11:40,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:40,355 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-28 10:11:40,355 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:40,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:40,356 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-28 10:11:40,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:40,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:40,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:40,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:40,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:40,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:40,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:40,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:40,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:11:40,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:40,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:40,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:40,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:11:40,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:11:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:11:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:11:40,806 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-28 10:11:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:41,734 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:11:41,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:11:41,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-28 10:11:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:41,735 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:11:41,735 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:11:41,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:11:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:11:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:11:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:11:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:11:41,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:11:41,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:41,741 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:11:41,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:11:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:11:41,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:11:41,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:41,741 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-28 10:11:41,742 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:41,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-28 10:11:41,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:41,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:41,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:41,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:41,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:42,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:42,272 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 [2018-09-28 10:11:42,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:42,292 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:11:42,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:42,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:42,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:42,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:11:42,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:11:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:11:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:11:42,371 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-28 10:11:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:42,994 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:11:42,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:11:42,995 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-28 10:11:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:42,995 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:11:42,995 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:11:42,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:11:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:11:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:11:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:11:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:11:43,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:11:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:43,002 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:11:43,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:11:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:11:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:11:43,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:43,003 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-28 10:11:43,003 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:43,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-28 10:11:43,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:43,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:43,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:43,456 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 [2018-09-28 10:11:43,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:43,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:43,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:43,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:11:43,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:11:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:11:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:11:43,510 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-28 10:11:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:43,975 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:11:43,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:11:43,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-28 10:11:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:43,976 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:11:43,976 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:11:43,977 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 [2018-09-28 10:11:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:11:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:11:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:11:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:11:43,982 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:11:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:43,982 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:11:43,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:11:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:11:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:11:43,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:43,983 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-28 10:11:43,984 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:43,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-28 10:11:43,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:43,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:43,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:43,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:44,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:44,512 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 [2018-09-28 10:11:44,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:44,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:44,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:44,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:44,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:44,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:11:44,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:11:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:11:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:11:44,579 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-28 10:11:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:45,055 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:11:45,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:11:45,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-28 10:11:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:45,056 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:11:45,056 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:11:45,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:11:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:11:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:11:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:11:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:11:45,061 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:11:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:45,062 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:11:45,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:11:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:11:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:11:45,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:45,062 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-28 10:11:45,063 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:45,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-28 10:11:45,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:45,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:45,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:45,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:45,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:45,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:45,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:45,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:45,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:11:45,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:45,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:45,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:45,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:11:45,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:11:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:11:45,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:11:45,605 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-28 10:11:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:46,266 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:11:46,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:11:46,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-28 10:11:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:46,267 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:11:46,267 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:11:46,268 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 [2018-09-28 10:11:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:11:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:11:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:11:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:11:46,273 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:11:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:46,273 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:11:46,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:11:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:11:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:11:46,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:46,274 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-28 10:11:46,274 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:46,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-28 10:11:46,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:46,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:46,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:46,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:46,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:46,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:46,842 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 [2018-09-28 10:11:46,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:46,859 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:46,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:46,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:46,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:46,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:11:46,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:11:46,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:11:46,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:11:46,893 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-28 10:11:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:47,442 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:11:47,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:11:47,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-28 10:11:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:47,444 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:11:47,444 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:11:47,445 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 [2018-09-28 10:11:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:11:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:11:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:11:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:11:47,450 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:11:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:47,450 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:11:47,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:11:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:11:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:11:47,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:47,451 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-28 10:11:47,451 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:47,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-28 10:11:47,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:47,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:47,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:47,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:48,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:48,303 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 [2018-09-28 10:11:48,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:48,336 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:11:48,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:48,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:48,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:48,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:11:48,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:11:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:11:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:11:48,381 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-28 10:11:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:48,998 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:11:48,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:11:48,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-28 10:11:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:48,999 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:11:49,000 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:11:49,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:11:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:11:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:11:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:11:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:11:49,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:11:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:49,005 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:11:49,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:11:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:11:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:11:49,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:49,006 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-28 10:11:49,006 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:49,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-28 10:11:49,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:49,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:49,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:49,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:49,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:49,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:49,662 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 [2018-09-28 10:11:49,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:11:49,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:11:49,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:49,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:49,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:49,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:11:49,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:11:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:11:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:11:49,740 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-28 10:11:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:50,359 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:11:50,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:11:50,359 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-28 10:11:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:50,360 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:11:50,360 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:11:50,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:11:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:11:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:11:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:11:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:11:50,365 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:11:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:50,366 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:11:50,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:11:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:11:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:11:50,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:50,366 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-28 10:11:50,367 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:50,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-28 10:11:50,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:50,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:50,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:50,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:50,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:52,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:52,294 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 [2018-09-28 10:11:52,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:52,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:52,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:52,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:11:52,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:11:52,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:11:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:11:52,354 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-28 10:11:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:53,190 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:11:53,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:11:53,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-28 10:11:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:53,192 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:11:53,192 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:11:53,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:11:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:11:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:11:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:11:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:11:53,197 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:11:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:53,197 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:11:53,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:11:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:11:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:11:53,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:53,198 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-28 10:11:53,198 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:53,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-28 10:11:53,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:53,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:53,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:53,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:11:53,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:53,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:53,906 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 [2018-09-28 10:11:53,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:11:53,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:11:53,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:53,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:54,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:54,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:11:54,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:11:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:11:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:11:54,024 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-28 10:11:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:54,724 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:11:54,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:11:54,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-28 10:11:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:54,725 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:11:54,725 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:11:54,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:11:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:11:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:11:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:11:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:11:54,730 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:11:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:54,730 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:11:54,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:11:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:11:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:11:54,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:54,731 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-28 10:11:54,731 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:54,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-28 10:11:54,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:54,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:54,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:54,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:54,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:55,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:55,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:11:55,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:11:55,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:11:55,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:55,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:55,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:55,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:11:55,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:11:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:11:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:11:55,456 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-28 10:11:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:56,212 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:11:56,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:11:56,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-28 10:11:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:56,213 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:11:56,213 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:11:56,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:11:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:11:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:11:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:11:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:11:56,219 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:11:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:56,219 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:11:56,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:11:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:11:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:11:56,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:56,220 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-28 10:11:56,220 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:56,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-28 10:11:56,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:56,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:56,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:56,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:56,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:57,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:57,043 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 [2018-09-28 10:11:57,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:11:57,064 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:11:57,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:57,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:57,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:57,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:11:57,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:11:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:11:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:11:57,110 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-28 10:11:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:57,922 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:11:57,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:11:57,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-28 10:11:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:57,922 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:11:57,922 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:11:57,923 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 [2018-09-28 10:11:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:11:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:11:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:11:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:11:57,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:11:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:57,926 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:11:57,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:11:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:11:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:11:57,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:57,926 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-28 10:11:57,926 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:57,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-28 10:11:57,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:57,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:57,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:57,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:57,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:11:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:58,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:11:58,823 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 [2018-09-28 10:11:58,830 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:11:58,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:11:58,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:11:58,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:11:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:11:58,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:11:58,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:11:58,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:11:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:11:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:11:58,887 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-28 10:11:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:11:59,713 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:11:59,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:11:59,713 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-28 10:11:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:11:59,714 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:11:59,714 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:11:59,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:11:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:11:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:11:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:11:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:11:59,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:11:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:11:59,719 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:11:59,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:11:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:11:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:11:59,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:11:59,720 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-28 10:11:59,720 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:11:59,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:11:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-28 10:11:59,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:11:59,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:11:59,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:59,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:11:59,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:11:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:00,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:00,653 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 [2018-09-28 10:12:00,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:00,680 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:12:00,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:00,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:00,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:00,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:12:00,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:12:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:12:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:12:00,711 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-28 10:12:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:01,601 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:12:01,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:12:01,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-28 10:12:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:01,603 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:12:01,603 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:12:01,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:12:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:12:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:12:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:12:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:12:01,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:12:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:12:01,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:12:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:12:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:12:01,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:01,609 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-28 10:12:01,609 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:01,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-28 10:12:01,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:01,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:01,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:01,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:01,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:03,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:03,277 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 [2018-09-28 10:12:03,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:03,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:03,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:03,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:12:03,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:12:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:12:03,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:12:03,325 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-28 10:12:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:04,229 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:12:04,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:12:04,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-28 10:12:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:04,230 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:12:04,231 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:12:04,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:12:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:12:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:12:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:12:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:12:04,234 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:12:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:04,235 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:12:04,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:12:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:12:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:12:04,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:04,236 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-28 10:12:04,236 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:04,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-28 10:12:04,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:04,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:04,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:04,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:04,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:05,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:05,294 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 [2018-09-28 10:12:05,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:05,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:05,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:05,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:05,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:05,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:12:05,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:12:05,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:12:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:12:05,346 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-28 10:12:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:06,298 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:12:06,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:12:06,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-28 10:12:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:06,299 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:12:06,299 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:12:06,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:12:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:12:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:12:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:12:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:12:06,303 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:12:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:06,303 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:12:06,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:12:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:12:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:12:06,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:06,304 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-28 10:12:06,305 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:06,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-28 10:12:06,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:06,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:06,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:07,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:07,295 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 [2018-09-28 10:12:07,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:07,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:12:07,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:07,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:07,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:07,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:12:07,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:12:07,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:12:07,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:12:07,357 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-28 10:12:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:08,521 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:12:08,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:12:08,522 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-28 10:12:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:08,522 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:12:08,523 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:12:08,524 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 [2018-09-28 10:12:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:12:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:12:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:12:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:12:08,527 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:12:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:08,527 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:12:08,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:12:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:12:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:12:08,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:08,528 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-28 10:12:08,528 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:08,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-28 10:12:08,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:08,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:08,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:08,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:08,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:09,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:09,643 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 [2018-09-28 10:12:09,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:09,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:09,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:09,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:09,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:09,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:12:09,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:12:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:12:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:12:09,695 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-28 10:12:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:10,743 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:12:10,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:12:10,743 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-28 10:12:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:10,744 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:12:10,744 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:12:10,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:12:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:12:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:12:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:12:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:12:10,748 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:12:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:10,749 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:12:10,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:12:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:12:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:12:10,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:10,749 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-28 10:12:10,750 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:10,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-28 10:12:10,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:10,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:10,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:10,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:10,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:12,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:12,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:12,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:12,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:12:12,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:12,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:12,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:12,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:12:12,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:12:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:12:12,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:12:12,842 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-28 10:12:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:14,108 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:12:14,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:12:14,108 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-28 10:12:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:14,109 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:12:14,109 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:12:14,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:12:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:12:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:12:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:12:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:12:14,114 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:12:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:14,114 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:12:14,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:12:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:12:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:12:14,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:14,114 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-28 10:12:14,115 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:14,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-28 10:12:14,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:14,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:14,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:15,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:15,097 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 [2018-09-28 10:12:15,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:15,125 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:12:15,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:15,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:15,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:15,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:12:15,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:12:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:12:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:12:15,162 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-28 10:12:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:16,283 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:12:16,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:12:16,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-28 10:12:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:16,285 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:12:16,285 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:12:16,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:12:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:12:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:12:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:12:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:12:16,291 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:12:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:16,291 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:12:16,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:12:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:12:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:12:16,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:16,292 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-28 10:12:16,292 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:16,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-28 10:12:16,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:16,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:16,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:16,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:16,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:17,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:17,409 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 [2018-09-28 10:12:17,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:17,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:17,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:17,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:12:17,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:12:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:12:17,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:12:17,480 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-28 10:12:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:18,811 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:12:18,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:12:18,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-28 10:12:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:18,812 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:12:18,812 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:12:18,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:12:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:12:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:12:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:12:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:12:18,817 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:12:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:18,817 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:12:18,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:12:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:12:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:12:18,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:18,818 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-28 10:12:18,818 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:18,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-28 10:12:18,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:18,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:18,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:18,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:18,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:19,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:19,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:19,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:19,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:19,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:19,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:19,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:19,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:12:19,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:12:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:12:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:12:19,960 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-28 10:12:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:21,244 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:12:21,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:12:21,245 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-28 10:12:21,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:21,246 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:12:21,246 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:12:21,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:12:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:12:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:12:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:12:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:12:21,251 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:12:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:21,251 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:12:21,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:12:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:12:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:12:21,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:21,252 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-28 10:12:21,252 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:21,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-28 10:12:21,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:21,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:21,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:21,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:21,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:22,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:22,406 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 [2018-09-28 10:12:22,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:22,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:12:22,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:22,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:22,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:22,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:12:22,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:12:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:12:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:12:22,493 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-28 10:12:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:23,985 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:12:23,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:12:23,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-28 10:12:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:23,987 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:12:23,987 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:12:23,987 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 [2018-09-28 10:12:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:12:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:12:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:12:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:12:23,992 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:12:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:23,992 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:12:23,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:12:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:12:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:12:23,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:23,993 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-28 10:12:23,993 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:23,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-28 10:12:23,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:23,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:23,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:23,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:23,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:25,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:25,258 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 [2018-09-28 10:12:25,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:25,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:25,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:25,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:25,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:25,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:12:25,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:12:25,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:12:25,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:12:25,318 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-28 10:12:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:26,721 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:12:26,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:12:26,722 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-28 10:12:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:26,723 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:12:26,723 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:12:26,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:12:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:12:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:12:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:12:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:12:26,728 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:12:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:26,728 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:12:26,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:12:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:12:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:12:26,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:26,729 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-28 10:12:26,729 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:26,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-28 10:12:26,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:26,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:26,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:27,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:27,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:27,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:27,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:12:27,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:27,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:27,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:27,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:12:27,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:12:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:12:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:12:27,967 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-28 10:12:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:29,646 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:12:29,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:12:29,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-28 10:12:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:29,647 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:12:29,648 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:12:29,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:12:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:12:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:12:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:12:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:12:29,654 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:12:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:29,655 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:12:29,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:12:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:12:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:12:29,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:29,656 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-28 10:12:29,656 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:29,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-28 10:12:29,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:29,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:29,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:29,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:29,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:30,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:30,990 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 [2018-09-28 10:12:30,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:31,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:12:31,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:31,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:31,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:31,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:12:31,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:12:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:12:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:12:31,089 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-28 10:12:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:32,553 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:12:32,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:12:32,553 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-28 10:12:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:32,554 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:12:32,554 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:12:32,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:12:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:12:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:12:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:12:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:12:32,559 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:12:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:32,559 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:12:32,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:12:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:12:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:12:32,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:32,560 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-28 10:12:32,560 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:32,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-28 10:12:32,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:32,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:32,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:32,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:32,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:34,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:34,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:34,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:34,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:34,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:34,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:12:34,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:12:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:12:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:12:34,149 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-28 10:12:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:35,681 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:12:35,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:12:35,682 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-28 10:12:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:35,683 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:12:35,683 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:12:35,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:12:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:12:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:12:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:12:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:12:35,687 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:12:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:35,687 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:12:35,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:12:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:12:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:12:35,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:35,688 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-28 10:12:35,688 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:35,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-28 10:12:35,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:35,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:35,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:37,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:37,573 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 [2018-09-28 10:12:37,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:37,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:37,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:37,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:37,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:37,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:12:37,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:12:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:12:37,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:12:37,633 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-28 10:12:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:39,415 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:12:39,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:12:39,416 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-28 10:12:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:39,417 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:12:39,417 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:12:39,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:12:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:12:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:12:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:12:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:12:39,422 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:12:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:39,422 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:12:39,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:12:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:12:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:12:39,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:39,423 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-28 10:12:39,423 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:39,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-28 10:12:39,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:39,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:39,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:39,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:39,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:40,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:40,871 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 [2018-09-28 10:12:40,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:12:40,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:12:40,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:40,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:40,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:40,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:12:40,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:12:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:12:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:12:40,943 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-28 10:12:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:42,645 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:12:42,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:12:42,646 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-28 10:12:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:42,647 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:12:42,647 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:12:42,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:12:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:12:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:12:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:12:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:12:42,651 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:12:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:42,651 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:12:42,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:12:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:12:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:12:42,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:42,652 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-28 10:12:42,652 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:42,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-28 10:12:42,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:42,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:42,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:42,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:42,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:44,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:44,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:44,272 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:12:44,288 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:12:44,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:44,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:44,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:44,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:12:44,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:12:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:12:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:12:44,325 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-28 10:12:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:46,013 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:12:46,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:12:46,013 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-28 10:12:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:46,014 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:12:46,014 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:12:46,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:12:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:12:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:12:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:12:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:12:46,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:12:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:46,020 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:12:46,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:12:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:12:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:12:46,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:46,021 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-28 10:12:46,021 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:46,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-28 10:12:46,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:46,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:46,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:46,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:47,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:47,582 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 [2018-09-28 10:12:47,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:12:47,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:12:47,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:47,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:47,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:47,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:12:47,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:12:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:12:47,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:12:47,660 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-28 10:12:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:49,605 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:12:49,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:12:49,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-28 10:12:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:49,607 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:12:49,607 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:12:49,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:12:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:12:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:12:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:12:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:12:49,611 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:12:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:49,612 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:12:49,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:12:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:12:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:12:49,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:49,612 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-28 10:12:49,613 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:49,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-28 10:12:49,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:49,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:51,738 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 [2018-09-28 10:12:51,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:12:51,774 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:12:51,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:51,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:51,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:51,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:12:51,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:12:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:12:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:12:51,808 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-28 10:12:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:53,660 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:12:53,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:12:53,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-28 10:12:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:53,661 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:12:53,661 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:12:53,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:12:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:12:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:12:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:12:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:12:53,665 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:12:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:53,666 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:12:53,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:12:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:12:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:12:53,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:53,666 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-28 10:12:53,666 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:53,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-28 10:12:53,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:53,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:53,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:12:53,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:55,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:55,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:12:55,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:55,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:55,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:55,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:12:55,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:12:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:12:55,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:12:55,607 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-28 10:12:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:12:57,564 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:12:57,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:12:57,565 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-28 10:12:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:12:57,566 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:12:57,566 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:12:57,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:12:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:12:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:12:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:12:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:12:57,570 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:12:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:12:57,570 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:12:57,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:12:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:12:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:12:57,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:12:57,571 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-28 10:12:57,571 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:12:57,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:12:57,571 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-28 10:12:57,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:12:57,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:12:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:57,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:12:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:12:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:12:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:12:59,163 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 [2018-09-28 10:12:59,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:12:59,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:12:59,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:12:59,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:12:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:12:59,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:12:59,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:12:59,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:12:59,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:12:59,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:12:59,225 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-28 10:13:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:01,372 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:13:01,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:13:01,372 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-28 10:13:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:01,373 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:13:01,373 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:13:01,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:13:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:13:01,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:13:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:13:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:13:01,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:13:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:01,379 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:13:01,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:13:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:13:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:13:01,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:01,379 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-28 10:13:01,380 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:01,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-28 10:13:01,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:01,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:01,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:01,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:01,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:03,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:03,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:03,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:13:03,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:03,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:03,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:03,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:13:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:13:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:13:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:13:03,143 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-28 10:13:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:05,377 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:13:05,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:13:05,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-28 10:13:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:05,379 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:13:05,379 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:13:05,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:13:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:13:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:13:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:13:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:13:05,385 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:13:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:05,385 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:13:05,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:13:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:13:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:13:05,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:05,386 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-28 10:13:05,386 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:05,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:05,386 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-28 10:13:05,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:05,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:05,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:05,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:07,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:07,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:07,525 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:07,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:07,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:07,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:07,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:13:07,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:13:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:13:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:13:07,563 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-28 10:13:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:09,814 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:13:09,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:13:09,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-28 10:13:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:09,815 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:13:09,815 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:13:09,815 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 [2018-09-28 10:13:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:13:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:13:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:13:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:13:09,819 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:13:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:09,819 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:13:09,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:13:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:13:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:13:09,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:09,819 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-28 10:13:09,820 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:09,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-28 10:13:09,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:09,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:09,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:09,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:09,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:11,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:11,616 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 [2018-09-28 10:13:11,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:11,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:13:11,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:11,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:11,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:11,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:13:11,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:13:11,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:13:11,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:13:11,695 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-28 10:13:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:13,934 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:13:13,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:13:13,934 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-28 10:13:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:13,935 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:13:13,935 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:13:13,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:13:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:13:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:13:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:13:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:13:13,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:13:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:13,939 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:13:13,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:13:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:13:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:13:13,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:13,940 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-28 10:13:13,940 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:13,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:13,940 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-28 10:13:13,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:13,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:13,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:13,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:13,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:16,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:16,200 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 [2018-09-28 10:13:16,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:16,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:13:16,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:16,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:16,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:16,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:13:16,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:13:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:13:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:13:16,299 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-28 10:13:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:20,142 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:13:20,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:13:20,142 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-28 10:13:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:20,142 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:13:20,143 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:13:20,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:13:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:13:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:13:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:13:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:13:20,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:13:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:20,146 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:13:20,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:13:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:13:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:13:20,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:20,146 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-28 10:13:20,146 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:20,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-28 10:13:20,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:20,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:20,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:20,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:20,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:22,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:22,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:22,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:22,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:22,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:22,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:13:22,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:13:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:13:22,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:13:22,081 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-28 10:13:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:24,447 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:13:24,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:13:24,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-28 10:13:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:24,448 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:13:24,449 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:13:24,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:13:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:13:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:13:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:13:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:13:24,452 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:13:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:24,453 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:13:24,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:13:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:13:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:13:24,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:24,453 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-28 10:13:24,454 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:24,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-28 10:13:24,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:24,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:24,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:24,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:26,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:26,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:26,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:26,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:26,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:26,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:13:26,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:13:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:13:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:13:26,847 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-28 10:13:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:29,341 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:13:29,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:13:29,342 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-28 10:13:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:29,343 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:13:29,343 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:13:29,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:13:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:13:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:13:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:13:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:13:29,357 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:13:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:29,359 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:13:29,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:13:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:13:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:13:29,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:29,359 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-28 10:13:29,360 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:29,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-28 10:13:29,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:29,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:29,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:29,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:31,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:31,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:31,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:13:31,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:31,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:31,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:13:31,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:13:31,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:13:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:13:31,898 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-28 10:13:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:34,340 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:13:34,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:13:34,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-28 10:13:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:34,341 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:13:34,341 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:13:34,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:13:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:13:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:13:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:13:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:13:34,346 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:13:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:34,346 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:13:34,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:13:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:13:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:13:34,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:34,347 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-28 10:13:34,347 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:34,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-28 10:13:34,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:34,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:34,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:34,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:36,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:36,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:13:36,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:36,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:36,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:36,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:36,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:36,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:13:36,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:13:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:13:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:13:36,703 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-28 10:13:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:39,287 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:13:39,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:13:39,288 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-28 10:13:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:39,288 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:13:39,289 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:13:39,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:13:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:13:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:13:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:13:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:13:39,293 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:13:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:39,293 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:13:39,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:13:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:13:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:13:39,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:39,294 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-28 10:13:39,294 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:39,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-28 10:13:39,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:39,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:39,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:39,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:41,626 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 [2018-09-28 10:13:41,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:41,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:13:41,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:41,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:41,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:13:41,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:13:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:13:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:13:41,711 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-28 10:13:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:44,438 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:13:44,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:13:44,438 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-28 10:13:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:44,440 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:13:44,440 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:13:44,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:13:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:13:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:13:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:13:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:13:44,445 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:13:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:44,445 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:13:44,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:13:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:13:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:13:44,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:44,446 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-28 10:13:44,446 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:44,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-28 10:13:44,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:44,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:44,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:44,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:47,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:47,167 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 [2018-09-28 10:13:47,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:47,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:13:47,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:47,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:47,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:47,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:13:47,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:13:47,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:13:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:13:47,247 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-28 10:13:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:49,994 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:13:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:13:49,994 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-28 10:13:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:49,995 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:13:49,995 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:13:49,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:13:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:13:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:13:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:13:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:13:50,000 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:13:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:50,000 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:13:50,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:13:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:13:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:13:50,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:50,000 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-28 10:13:50,001 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:50,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:50,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-28 10:13:50,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:50,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:50,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:50,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:52,525 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 [2018-09-28 10:13:52,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:52,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:52,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:13:52,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:13:52,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:13:52,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:13:52,587 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-28 10:13:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:55,360 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:13:55,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:13:55,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-28 10:13:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:55,361 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:13:55,361 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:13:55,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:13:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:13:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:13:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:13:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:13:55,366 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:13:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:55,366 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:13:55,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:13:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:13:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:13:55,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:55,367 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-28 10:13:55,367 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:55,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-28 10:13:55,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:55,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:55,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:55,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:55,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:57,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:57,912 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 [2018-09-28 10:13:57,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:57,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:57,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:57,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:57,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:57,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:13:57,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:13:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:13:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:13:57,987 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-28 10:14:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:01,162 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:14:01,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:14:01,162 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-28 10:14:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:01,163 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:14:01,163 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:14:01,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:14:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:14:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:14:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:14:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:14:01,168 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:14:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:01,168 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:14:01,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:14:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:14:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:14:01,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:01,169 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-28 10:14:01,169 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:01,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-28 10:14:01,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:01,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:01,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:01,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:03,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:03,503 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 [2018-09-28 10:14:03,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:03,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:14:03,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:03,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:03,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:03,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:14:03,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:14:03,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:14:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:14:03,595 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-28 10:14:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:06,840 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:14:06,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:14:06,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-28 10:14:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:06,841 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:14:06,841 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:14:06,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:14:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:14:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:14:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:14:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:14:06,846 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:14:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:14:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:14:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:14:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:14:06,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:06,848 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-28 10:14:06,848 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:06,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-28 10:14:06,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:06,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:06,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:09,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:09,257 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 [2018-09-28 10:14:09,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:09,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:09,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:09,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:09,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:09,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:14:09,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:14:09,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:14:09,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:14:09,330 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-28 10:14:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:13,483 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:14:13,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:14:13,483 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-28 10:14:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:13,484 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:14:13,485 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:14:13,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:14:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:14:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:14:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:14:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:14:13,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:14:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:13,491 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:14:13,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:14:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:14:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:14:13,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:13,492 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-28 10:14:13,492 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:13,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-28 10:14:13,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:13,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:13,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:13,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:13,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:16,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:16,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:16,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:16,100 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:14:16,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:16,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:16,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:16,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:14:16,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:14:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:14:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:14:16,163 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-28 10:14:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:19,492 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:14:19,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:14:19,492 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-28 10:14:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:19,493 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:14:19,494 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:14:19,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:14:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:14:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:14:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:14:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:14:19,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:14:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:19,499 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:14:19,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:14:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:14:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:14:19,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:19,500 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-28 10:14:19,500 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:19,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-28 10:14:19,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:19,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:19,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:19,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:19,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:22,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:22,850 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 [2018-09-28 10:14:22,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:23,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:14:23,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:23,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:23,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:23,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:14:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:14:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:14:23,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:14:23,100 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-28 10:14:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:26,580 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:14:26,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:14:26,580 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-28 10:14:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:26,581 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:14:26,581 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:14:26,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:14:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:14:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:14:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:14:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:14:26,587 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:14:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:26,587 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:14:26,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:14:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:14:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:14:26,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:26,588 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-28 10:14:26,588 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:26,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-28 10:14:26,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:26,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:26,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:26,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:29,890 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 [2018-09-28 10:14:29,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:29,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:14:29,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:14:29,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:14:29,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:14:29,976 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-28 10:14:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,414 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:14:33,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:14:33,414 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-28 10:14:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,415 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:14:33,415 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:14:33,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:14:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:14:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:14:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:14:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:14:33,421 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:14:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,422 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:14:33,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:14:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:14:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:14:33,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,422 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-28 10:14:33,423 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-28 10:14:33,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:33,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:37,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:37,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:37,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:37,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:14:37,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:14:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:14:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:14:37,615 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-28 10:14:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,043 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:14:41,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:14:41,044 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-28 10:14:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,045 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:14:41,045 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:14:41,046 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 [2018-09-28 10:14:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:14:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:14:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:14:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:14:41,050 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:14:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,050 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:14:41,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:14:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:14:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:14:41,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,051 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-28 10:14:41,051 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-28 10:14:41,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:41,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,028 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 [2018-09-28 10:14:44,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:44,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:14:44,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:14:44,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:14:44,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:14:44,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:14:44,129 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-28 10:14:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:47,883 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:14:47,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:14:47,883 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-28 10:14:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:47,884 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:14:47,884 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:14:47,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:14:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:14:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:14:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:14:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:14:47,888 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:14:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:47,889 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:14:47,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:14:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:14:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:14:47,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:47,889 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-28 10:14:47,889 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:47,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-28 10:14:47,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:47,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:47,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:47,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:51,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:51,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:51,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:51,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:51,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:51,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:14:51,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:14:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:14:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:14:51,598 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-28 10:14:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:55,536 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:14:55,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:14:55,537 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-28 10:14:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:55,538 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:14:55,538 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:14:55,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:14:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:14:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:14:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:14:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:14:55,542 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:14:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:55,542 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:14:55,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:14:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:14:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:14:55,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:55,543 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-28 10:14:55,543 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:55,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-28 10:14:55,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:55,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:55,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:55,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,842 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 [2018-09-28 10:14:58,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:58,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:14:58,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:59,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:14:59,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:14:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:14:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:14:59,006 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-28 10:15:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:03,022 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:15:03,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:15:03,023 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-28 10:15:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:03,023 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:15:03,024 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:15:03,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:15:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:15:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:15:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:15:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:15:03,029 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:15:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:03,030 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:15:03,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:15:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:15:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:15:03,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:03,030 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-28 10:15:03,031 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:03,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-28 10:15:03,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:03,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:03,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:03,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:06,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:06,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:06,120 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:15:06,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:06,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:06,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:15:06,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:15:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:15:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:15:06,164 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-28 10:15:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:10,187 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:15:10,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:15:10,187 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-28 10:15:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:10,188 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:15:10,189 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:15:10,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:15:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:15:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:15:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:15:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:15:10,193 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:15:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:10,193 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:15:10,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:15:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:15:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:15:10,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,194 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-28 10:15:10,194 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-28 10:15:10,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:14,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:14,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:15:14,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:15:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:15:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:15:14,367 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-28 10:15:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,546 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:15:18,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:15:18,547 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-28 10:15:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,548 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:15:18,548 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:15:18,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:15:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:15:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:15:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:15:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:15:18,553 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:15:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,554 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:15:18,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:15:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:15:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:15:18,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,554 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-28 10:15:18,555 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-28 10:15:18,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:22,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:22,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:22,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:22,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:22,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:22,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:15:22,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:15:22,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:15:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:15:22,111 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-28 10:15:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,317 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:15:26,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:15:26,317 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-28 10:15:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,318 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:15:26,318 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:15:26,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:15:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:15:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:15:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:15:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:15:26,323 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:15:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,323 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:15:26,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:15:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:15:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:15:26,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,324 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-28 10:15:26,324 INFO L423 AbstractCegarLoop]: === Iteration 82 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-28 10:15:26,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:15:29,489 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:15:29,493 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:15:29,493 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:15:29 BoogieIcfgContainer [2018-09-28 10:15:29,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:15:29,494 INFO L168 Benchmark]: Toolchain (without parser) took 243294.61 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -98.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 72.2 MB). Peak memory consumption was 478.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:29,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:29,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:29,496 INFO L168 Benchmark]: Boogie Preprocessor took 27.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:15:29,496 INFO L168 Benchmark]: RCFGBuilder took 240.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:29,497 INFO L168 Benchmark]: TraceAbstraction took 242973.91 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -98.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 51.1 MB). Peak memory consumption was 457.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:15:29,500 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 240.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242973.91 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -98.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 51.1 MB). Peak memory consumption was 457.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 84 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 81 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 242.9s OverallTime, 82 OverallIterations, 81 TraceHistogramMax, 121.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 163 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 187085 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6641 GetRequests, 3240 SyntacticMatches, 80 SemanticMatches, 3321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.2s 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, 2.0s SatisfiabilityAnalysisTime, 112.0s InterpolantComputationTime, 6802 NumberOfCodeBlocks, 6802 NumberOfCodeBlocksAsserted, 981 NumberOfCheckSat, 6641 ConstructedInterpolants, 0 QuantifiedInterpolants, 2526167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6880 ConjunctsInSsa, 6720 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/177120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-15-29-509.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-0-2018-09-28_10-15-29-509.csv Completed graceful shutdown