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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:29:52,807 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:29:52,809 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:29:52,822 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:29:52,822 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:29:52,823 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:29:52,824 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:29:52,826 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:29:52,828 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:29:52,828 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:29:52,829 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:29:52,855 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 [2018-09-26 21:29:52,878 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:29:52,878 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:29:52,879 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:29:52,879 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:29:52,880 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:29:52,880 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:29:52,880 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:29:52,881 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:29:52,881 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:29:52,881 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:29:52,881 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:29:52,881 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:29:52,882 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:29:52,883 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:29:52,883 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:29:52,883 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:29:52,883 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:29:52,883 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:29:52,884 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:29:52,884 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:29:52,884 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:29:52,884 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:29:52,884 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:29:52,884 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:29:52,885 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:29:52,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:29:52,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:29:52,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:29:52,947 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:29:52,947 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:29:52,948 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-26 21:29:52,948 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-26 21:29:52,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:29:52,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:29:52,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:29:52,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:29:52,997 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:29:53,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,034 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:29:53,035 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:29:53,035 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:29:53,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:29:53,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:29:53,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:29:53,038 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:29:53,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/1) ... [2018-09-26 21:29:53,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:29:53,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:29:53,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:29:53,060 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:29:53,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (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 [2018-09-26 21:29:53,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:29:53,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:29:53,327 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:29:53,328 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:29:53 BoogieIcfgContainer [2018-09-26 21:29:53,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:29:53,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:29:53,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:29:53,333 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:29:53,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:29:52" (1/2) ... [2018-09-26 21:29:53,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3862bdc5 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:29:53, skipping insertion in model container [2018-09-26 21:29:53,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:29:53" (2/2) ... [2018-09-26 21:29:53,337 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-26 21:29:53,347 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:29:53,359 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:29:53,415 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:29:53,416 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:29:53,416 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:29:53,416 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:29:53,416 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:29:53,417 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:29:53,417 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:29:53,417 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:29:53,417 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:29:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:29:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:29:53,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:53,444 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:29:53,445 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:53,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-26 21:29:53,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:53,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:53,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:53,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,692 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:29:53,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:29:53,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:29:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:29:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:29:53,717 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:29:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:53,861 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:29:53,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:29:53,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:29:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:53,884 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:29:53,884 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:29:53,893 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 [2018-09-26 21:29:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:29:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:29:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:29:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:29:53,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-26 21:29:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:53,969 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:29:53,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:29:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:29:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:29:53,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:53,970 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:29:53,972 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:53,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-26 21:29:53,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:53,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:53,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:53,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:54,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:54,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:54,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:54,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-26 21:29:54,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:29:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:29:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:29:54,262 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-26 21:29:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:54,322 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:29:54,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:29:54,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-26 21:29:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:54,323 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:29:54,323 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:29:54,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:29:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:29:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:29:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:29:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:29:54,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-26 21:29:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:54,328 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:29:54,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:29:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:29:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:29:54,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:54,329 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-26 21:29:54,329 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:54,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-26 21:29:54,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:54,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:54,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:54,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:54,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:54,428 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 [2018-09-26 21:29:54,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:54,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:54,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:54,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:54,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:54,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-26 21:29:54,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:29:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:29:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:54,627 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-26 21:29:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:54,856 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:29:54,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:29:54,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-26 21:29:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:54,857 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:29:54,857 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:29:54,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:29:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:29:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:29:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:29:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:29:54,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-26 21:29:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:54,862 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:29:54,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:29:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:29:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:29:54,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:54,863 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-26 21:29:54,863 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:54,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-26 21:29:54,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:54,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:54,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:54,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:55,072 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 [2018-09-26 21:29:55,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:55,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:29:55,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:55,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:55,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-26 21:29:55,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:29:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:29:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:29:55,197 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-26 21:29:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:55,260 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:29:55,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:29:55,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-26 21:29:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:55,261 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:29:55,262 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:29:55,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:29:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:29:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:29:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:29:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:29:55,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-26 21:29:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:55,267 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:29:55,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:29:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:29:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:29:55,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:55,268 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-26 21:29:55,268 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:55,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-26 21:29:55,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:55,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:55,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:55,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:55,441 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 [2018-09-26 21:29:55,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:55,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:55,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:55,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:55,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-26 21:29:55,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:29:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:29:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:29:55,605 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-26 21:29:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:55,722 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:29:55,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:29:55,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-26 21:29:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:55,723 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:29:55,723 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:29:55,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:29:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:29:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:29:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:29:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:29:55,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-26 21:29:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:55,729 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:29:55,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:29:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:29:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:29:55,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:55,730 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-26 21:29:55,730 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:55,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-26 21:29:55,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:55,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:55,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:55,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:55,858 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 [2018-09-26 21:29:55,867 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:55,905 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:29:55,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:55,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:56,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-26 21:29:56,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:29:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:29:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:29:56,040 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-26 21:29:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:56,141 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:29:56,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:29:56,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:29:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:56,144 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:29:56,144 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:29:56,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:29:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:29:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:29:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:29:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:29:56,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-26 21:29:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:56,149 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:29:56,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:29:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:29:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:29:56,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:56,150 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-26 21:29:56,150 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:56,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-26 21:29:56,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:56,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:56,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:56,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:56,528 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 [2018-09-26 21:29:56,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:56,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:29:56,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:56,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:56,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-26 21:29:56,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:29:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:29:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:29:56,719 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-26 21:29:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:56,773 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:29:56,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:29:56,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-26 21:29:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:56,775 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:29:56,775 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:29:56,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:29:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:29:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:29:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:29:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:29:56,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-26 21:29:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:56,781 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:29:56,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:29:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:29:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:29:56,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:56,782 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-26 21:29:56,782 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:56,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-26 21:29:56,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:56,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:56,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:56,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:56,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:56,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:56,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:56,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:57,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-26 21:29:57,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:29:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:29:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:29:57,180 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-26 21:29:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:57,238 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:29:57,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:29:57,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-26 21:29:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:57,239 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:29:57,239 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:29:57,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:29:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:29:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:29:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:29:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:29:57,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-26 21:29:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:57,244 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:29:57,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:29:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:29:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:29:57,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:57,246 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-26 21:29:57,246 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:57,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-26 21:29:57,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:57,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:57,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:57,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:57,450 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 [2018-09-26 21:29:57,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:57,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:57,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:57,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:57,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-26 21:29:57,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:29:57,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:29:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:57,653 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-26 21:29:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:57,720 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:29:57,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:29:57,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-26 21:29:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:57,723 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:29:57,723 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:29:57,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:29:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:29:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:29:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:29:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:29:57,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-26 21:29:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:57,728 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:29:57,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:29:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:29:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:29:57,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:57,729 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-26 21:29:57,729 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:57,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-26 21:29:57,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:57,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:57,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:57,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:57,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:57,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:57,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:29:57,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:57,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:58,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-26 21:29:58,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:29:58,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:29:58,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:29:58,156 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-26 21:29:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:58,397 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:29:58,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:29:58,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-26 21:29:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:58,404 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:29:58,404 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:29:58,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:29:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:29:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:29:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:29:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:29:58,409 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-26 21:29:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:58,409 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:29:58,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:29:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:29:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:29:58,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:58,411 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-26 21:29:58,411 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:58,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-26 21:29:58,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:58,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:58,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:58,701 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 [2018-09-26 21:29:58,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:58,719 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:58,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:58,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:58,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-26 21:29:58,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:29:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:29:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:29:58,963 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-26 21:29:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:59,026 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:29:59,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:29:59,027 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-26 21:29:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:59,028 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:29:59,028 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:29:59,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:29:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:29:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:29:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:29:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:29:59,034 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-26 21:29:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:59,034 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:29:59,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:29:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:29:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:29:59,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:59,036 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-26 21:29:59,036 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:59,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-26 21:29:59,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:59,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:59,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:59,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:59,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:59,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:59,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:59,242 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:29:59,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:59,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:59,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:59,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-26 21:29:59,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:29:59,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:29:59,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:59,749 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-26 21:29:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:59,847 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:29:59,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:29:59,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-26 21:29:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:59,848 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:29:59,848 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:29:59,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:29:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:29:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:29:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:29:59,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-26 21:29:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:59,856 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:29:59,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:29:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:29:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:29:59,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:59,857 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-26 21:29:59,857 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:59,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-26 21:29:59,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:59,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:59,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:59,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:00,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:00,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:00,188 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:30:00,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:00,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:00,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-26 21:30:00,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:30:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:30:00,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:30:00,509 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-26 21:30:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:00,581 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:30:00,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:30:00,582 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-26 21:30:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:00,583 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:00,583 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:30:00,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:30:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:30:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:30:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:30:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:30:00,588 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-26 21:30:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:00,588 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:30:00,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:30:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:30:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:30:00,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:00,589 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-26 21:30:00,590 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:00,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-26 21:30:00,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:00,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:00,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:00,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:00,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:00,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:00,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:00,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:01,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:01,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-26 21:30:01,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:30:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:30:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:30:01,269 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-26 21:30:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:01,348 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:30:01,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:30:01,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-26 21:30:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:01,349 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:01,349 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:30:01,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:30:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:30:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:30:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:30:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:30:01,354 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-26 21:30:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:01,354 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:30:01,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:30:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:30:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:30:01,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:01,355 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-26 21:30:01,356 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:01,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-26 21:30:01,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:01,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:01,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:01,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:01,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:01,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:01,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:01,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:01,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:01,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:01,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:01,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:01,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-26 21:30:01,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:30:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:30:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:30:01,899 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-26 21:30:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:02,007 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:30:02,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:30:02,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-26 21:30:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:02,009 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:30:02,009 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:30:02,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:30:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:30:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:30:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:30:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:30:02,015 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-26 21:30:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:02,016 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:30:02,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:30:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:30:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:30:02,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:02,017 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-26 21:30:02,017 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:02,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-26 21:30:02,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:02,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:02,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:02,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:02,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:02,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:02,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:02,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:30:02,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:02,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:02,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:02,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-26 21:30:02,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:30:02,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:30:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:02,815 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-26 21:30:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:02,941 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:30:02,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:30:02,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-26 21:30:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:02,942 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:30:02,943 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:30:02,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:30:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:30:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:30:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:30:02,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-26 21:30:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:02,949 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:30:02,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:30:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:30:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:30:02,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:02,950 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-26 21:30:02,950 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:02,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-26 21:30:02,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:02,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:02,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:02,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:03,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:03,156 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 [2018-09-26 21:30:03,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:03,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:03,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:03,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:03,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:03,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-26 21:30:03,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:30:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:30:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:03,486 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-26 21:30:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:03,563 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:30:03,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:30:03,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-26 21:30:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:03,565 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:30:03,565 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:30:03,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:30:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:30:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:30:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:30:03,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-26 21:30:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:03,571 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:30:03,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:30:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:30:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:30:03,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:03,572 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-26 21:30:03,572 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:03,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-26 21:30:03,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:03,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:03,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:03,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:03,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:03,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:03,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:30:03,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:03,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:04,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:04,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-26 21:30:04,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:30:04,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:30:04,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:04,371 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-26 21:30:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:04,665 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:30:04,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:30:04,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-26 21:30:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:04,666 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:30:04,666 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:30:04,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:30:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:30:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:30:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:30:04,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-26 21:30:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:04,688 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:30:04,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:30:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:30:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:30:04,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:04,690 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-26 21:30:04,690 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:04,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-26 21:30:04,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:04,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:04,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:04,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:05,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:05,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:05,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:05,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:30:05,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:05,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:06,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-26 21:30:06,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:30:06,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:30:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:06,120 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-26 21:30:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:06,206 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:30:06,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:30:06,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-26 21:30:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:06,208 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:30:06,208 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:30:06,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:30:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:30:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:30:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:30:06,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-26 21:30:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:06,214 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:30:06,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:30:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:30:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:30:06,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:06,215 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-26 21:30:06,215 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:06,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-26 21:30:06,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:06,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:06,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:06,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:06,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:06,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:06,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:07,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:07,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-26 21:30:07,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:30:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:30:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:07,395 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-26 21:30:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:07,568 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:30:07,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:30:07,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-26 21:30:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:07,570 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:30:07,570 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:30:07,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:30:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:30:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:30:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:30:07,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-26 21:30:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:07,576 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:30:07,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:30:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:30:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:30:07,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:07,577 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-26 21:30:07,578 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:07,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-26 21:30:07,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:07,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:07,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:07,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:07,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:08,182 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 [2018-09-26 21:30:08,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:08,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:08,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:08,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:08,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-26 21:30:08,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:30:08,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:30:08,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:08,563 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-26 21:30:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:08,684 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:30:08,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:30:08,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-26 21:30:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:08,686 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:30:08,686 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:30:08,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:30:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:30:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:30:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:30:08,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-26 21:30:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:08,693 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:30:08,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:30:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:30:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:30:08,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:08,694 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-26 21:30:08,695 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:08,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-26 21:30:08,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:08,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:08,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:08,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:09,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:09,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:09,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:09,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:30:09,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:09,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:09,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:09,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-26 21:30:09,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:30:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:30:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:09,997 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-26 21:30:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:10,134 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:30:10,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:30:10,135 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-26 21:30:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:10,136 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:30:10,136 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:30:10,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:30:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:30:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:30:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:30:10,141 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-26 21:30:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:10,141 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:30:10,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:30:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:30:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:30:10,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:10,142 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-26 21:30:10,142 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:10,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-26 21:30:10,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:10,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:10,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:10,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:10,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:11,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:11,103 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 [2018-09-26 21:30:11,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:11,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:11,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:11,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:11,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:11,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-26 21:30:11,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:30:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:30:11,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:11,707 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-26 21:30:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:11,795 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:30:11,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:30:11,795 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-26 21:30:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:11,796 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:30:11,797 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:30:11,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:30:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:30:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:30:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:30:11,803 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-26 21:30:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:11,804 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:30:11,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:30:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:30:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:30:11,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:11,804 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-26 21:30:11,805 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:11,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-26 21:30:11,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:11,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:11,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:11,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:11,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:12,208 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 [2018-09-26 21:30:12,215 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:12,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:30:12,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:12,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:12,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-26 21:30:12,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:30:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:30:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:30:12,741 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-26 21:30:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:12,868 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:30:12,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:30:12,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-26 21:30:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:12,871 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:30:12,871 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:30:12,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:30:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:30:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:30:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:30:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:30:12,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-26 21:30:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:12,877 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:30:12,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:30:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:30:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:30:12,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:12,878 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-26 21:30:12,878 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:12,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-26 21:30:12,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:12,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:12,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:12,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:12,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:13,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:13,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:13,343 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:13,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:30:13,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:13,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:13,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:13,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-26 21:30:13,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:30:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:30:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:30:13,837 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-26 21:30:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:13,988 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:30:13,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:30:13,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-26 21:30:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:13,989 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:30:13,989 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:30:13,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:30:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:30:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:30:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:30:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:30:13,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-26 21:30:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:13,994 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:30:13,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:30:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:30:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:30:13,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:13,995 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-26 21:30:13,995 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:13,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-26 21:30:13,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:13,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:13,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:13,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:13,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:14,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:14,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:14,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:14,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:14,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:14,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-26 21:30:14,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:30:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:30:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:30:14,872 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-26 21:30:15,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:15,003 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:30:15,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:30:15,003 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-26 21:30:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:15,004 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:30:15,004 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:30:15,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:30:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:30:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:30:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:30:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:30:15,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-26 21:30:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:15,010 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:30:15,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:30:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:30:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:30:15,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:15,011 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-26 21:30:15,011 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:15,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-26 21:30:15,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:15,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:15,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:15,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:15,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:15,464 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 [2018-09-26 21:30:15,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:15,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:15,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:15,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:16,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-26 21:30:16,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:30:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:30:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:30:16,198 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-26 21:30:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:16,326 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:30:16,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:30:16,326 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-26 21:30:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:16,327 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:30:16,327 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:30:16,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:30:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:30:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:30:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:30:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:30:16,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-26 21:30:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:16,333 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:30:16,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:30:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:30:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:30:16,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:16,334 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-26 21:30:16,334 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:16,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-26 21:30:16,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:16,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:16,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:16,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:16,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:16,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:16,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:16,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:16,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:30:16,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:16,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:17,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-26 21:30:17,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:30:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:30:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:30:17,331 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-26 21:30:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:17,472 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:30:17,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:30:17,472 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-26 21:30:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:17,473 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:30:17,473 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:30:17,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:30:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:30:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:30:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:30:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:30:17,478 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-26 21:30:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:17,478 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:30:17,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:30:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:30:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:30:17,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:17,479 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-26 21:30:17,479 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:17,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-26 21:30:17,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:17,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:17,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:17,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:17,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:17,972 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:17,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:17,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-26 21:30:19,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:30:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:30:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:30:19,119 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-26 21:30:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:19,313 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:30:19,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:30:19,314 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-26 21:30:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:19,315 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:30:19,315 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:30:19,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:30:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:30:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:30:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:30:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:30:19,320 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-26 21:30:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:19,320 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:30:19,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:30:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:30:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:30:19,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:19,321 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-26 21:30:19,321 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:19,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-26 21:30:19,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:19,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:19,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:19,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:19,794 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 [2018-09-26 21:30:19,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:19,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:30:19,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:19,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:20,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-26 21:30:20,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:30:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:30:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:30:20,407 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-26 21:30:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:20,546 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:30:20,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:30:20,546 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-26 21:30:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:20,547 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:30:20,548 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:30:20,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:30:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:30:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:30:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:30:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:30:20,551 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-26 21:30:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:20,551 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:30:20,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:30:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:30:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:30:20,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:20,552 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-26 21:30:20,552 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:20,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:20,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-26 21:30:20,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:20,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:20,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:20,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:21,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:21,459 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 [2018-09-26 21:30:21,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:21,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:30:21,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:21,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:22,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-26 21:30:22,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:30:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:30:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:30:22,164 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-26 21:30:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:22,281 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:30:22,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:30:22,282 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-26 21:30:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:22,283 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:30:22,283 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:30:22,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:30:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:30:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:30:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:30:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:30:22,288 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-26 21:30:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:22,288 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:30:22,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:30:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:30:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:30:22,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:22,289 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-26 21:30:22,289 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:22,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:22,289 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-26 21:30:22,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:22,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:22,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:22,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:22,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:22,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-26 21:30:23,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:30:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:30:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:30:23,576 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-26 21:30:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:23,746 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:30:23,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:30:23,746 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-26 21:30:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:23,747 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:30:23,747 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:30:23,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:30:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:30:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:30:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:30:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:30:23,753 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-26 21:30:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:23,753 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:30:23,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:30:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:30:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:30:23,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:23,754 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-26 21:30:23,754 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:23,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-26 21:30:23,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:23,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:23,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:23,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:25,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:25,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:25,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:25,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:25,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:26,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-26 21:30:26,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:30:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:30:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:30:26,344 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-26 21:30:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:26,482 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:30:26,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:30:26,483 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-26 21:30:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:26,484 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:30:26,484 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:30:26,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:30:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:30:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:30:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:30:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:30:26,489 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-26 21:30:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:26,490 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:30:26,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:30:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:30:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:30:26,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:26,490 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-26 21:30:26,491 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:26,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-26 21:30:26,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:26,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:26,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,146 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 [2018-09-26 21:30:27,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:27,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:30:27,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:27,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:27,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-26 21:30:27,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:30:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:30:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:27,933 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-26 21:30:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:28,153 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:30:28,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:30:28,153 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-26 21:30:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:28,154 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:30:28,154 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:30:28,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:30:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:30:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:30:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:30:28,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-26 21:30:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:30:28,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:30:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:30:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:30:28,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:28,159 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-26 21:30:28,159 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:28,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-26 21:30:28,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:28,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:28,869 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 [2018-09-26 21:30:28,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:28,898 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:28,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:28,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:29,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:29,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-26 21:30:29,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:30:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:30:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:29,646 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-26 21:30:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:29,820 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:30:29,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:30:29,821 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-26 21:30:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:29,822 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:30:29,822 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:30:29,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:30:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:30:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:30:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:30:29,827 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-26 21:30:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:30:29,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:30:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:30:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:30:29,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:29,828 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-26 21:30:29,828 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:29,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-26 21:30:29,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:29,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:29,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:30,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:30,696 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 [2018-09-26 21:30:30,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:30,742 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:30:30,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:30,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:31,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-26 21:30:31,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:30:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:30:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:30:31,875 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-26 21:30:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:32,223 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:30:32,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:30:32,224 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-26 21:30:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:32,225 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:30:32,225 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:30:32,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:30:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:30:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:30:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:30:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:30:32,229 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-26 21:30:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:32,229 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:30:32,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:30:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:30:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:30:32,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:32,230 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-26 21:30:32,230 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:32,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-26 21:30:32,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:32,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:32,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:32,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:32,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:33,096 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 [2018-09-26 21:30:33,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:33,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:30:33,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:33,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:33,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-26 21:30:33,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:30:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:30:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:30:33,990 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-26 21:30:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:34,167 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:30:34,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:30:34,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-26 21:30:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:34,168 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:30:34,168 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:30:34,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:30:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:30:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:30:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:30:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:30:34,173 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-26 21:30:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:34,173 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:30:34,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:30:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:30:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:30:34,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:34,174 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-26 21:30:34,175 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:34,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:34,175 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-26 21:30:34,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:34,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:34,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:34,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:35,606 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 [2018-09-26 21:30:35,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:35,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:36,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:36,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-26 21:30:36,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:30:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:30:36,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:30:36,820 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-26 21:30:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:36,982 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:30:36,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:30:36,983 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-26 21:30:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:36,984 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:30:36,984 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:30:36,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:30:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:30:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:30:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:30:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:30:36,989 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-26 21:30:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:36,989 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:30:36,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:30:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:30:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:30:36,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:36,991 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-26 21:30:36,991 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:36,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-26 21:30:36,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:36,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:36,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:36,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:38,385 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 [2018-09-26 21:30:38,393 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:38,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:38,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:38,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:39,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:39,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-26 21:30:39,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:30:39,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:30:39,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:30:39,351 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-26 21:30:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:39,558 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:30:39,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:30:39,559 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-26 21:30:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:39,560 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:30:39,560 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:30:39,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:30:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:30:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:30:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:30:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:30:39,564 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-26 21:30:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:39,564 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:30:39,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:30:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:30:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:30:39,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:39,564 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-26 21:30:39,565 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:39,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-26 21:30:39,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:39,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:39,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:39,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:40,865 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 [2018-09-26 21:30:40,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:40,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:30:40,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:40,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:42,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:42,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-26 21:30:42,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:30:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:30:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:30:42,152 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-26 21:30:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:42,333 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:30:42,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:30:42,334 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-26 21:30:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:42,335 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:30:42,335 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:30:42,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:30:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:30:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:30:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:30:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:30:42,339 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-26 21:30:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:42,340 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:30:42,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:30:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:30:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:30:42,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:42,341 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-26 21:30:42,341 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:42,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-26 21:30:42,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:42,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:42,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:43,217 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 [2018-09-26 21:30:43,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:43,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:43,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:43,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:44,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:44,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-26 21:30:44,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:30:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:30:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:30:44,275 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-26 21:30:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:44,441 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:30:44,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:30:44,441 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-26 21:30:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:44,442 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:30:44,442 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:30:44,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:30:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:30:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:30:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:30:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:30:44,448 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-26 21:30:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:44,448 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:30:44,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:30:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:30:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:30:44,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:44,449 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-26 21:30:44,449 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:44,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-26 21:30:44,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:44,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:44,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:44,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:44,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:45,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:45,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:45,370 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:45,408 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:30:45,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:45,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:46,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:46,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-26 21:30:46,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:30:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:30:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:30:46,724 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-26 21:30:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:46,929 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:30:46,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:30:46,930 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-26 21:30:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:46,931 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:30:46,931 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:30:46,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:30:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:30:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:30:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:30:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:30:46,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-26 21:30:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:46,937 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:30:46,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:30:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:30:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:30:46,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:46,938 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-26 21:30:46,938 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:46,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-26 21:30:46,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:46,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:46,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:46,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:48,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:30:48,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:48,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-26 21:30:49,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:30:49,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:30:49,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:49,310 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-26 21:30:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:49,526 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:30:49,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:30:49,527 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-26 21:30:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:49,528 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:30:49,528 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:30:49,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:30:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:30:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:30:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:30:49,532 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-26 21:30:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:49,532 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:30:49,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:30:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:30:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:30:49,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:49,533 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-26 21:30:49,533 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:49,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-26 21:30:49,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:49,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:49,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:49,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,462 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 [2018-09-26 21:30:50,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-26 21:30:51,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:30:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:30:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:51,818 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-26 21:30:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,991 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:30:51,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:30:51,991 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-26 21:30:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,992 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:30:51,992 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:30:51,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:30:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:30:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:30:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:30:51,998 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-26 21:30:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,998 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:30:51,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:30:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:30:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:30:51,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,999 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-26 21:30:51,999 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-26 21:30:52,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:52,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,007 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 [2018-09-26 21:30:53,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:53,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:53,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:53,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:54,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-26 21:30:54,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:30:54,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:30:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:30:54,308 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-26 21:30:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,493 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:30:54,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:30:54,493 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-26 21:30:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,494 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:30:54,495 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:30:54,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:30:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:30:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:30:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:30:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:30:54,499 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-26 21:30:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,499 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:30:54,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:30:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:30:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:30:54,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,500 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-26 21:30:54,500 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-26 21:30:54,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:55,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:55,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:30:55,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-26 21:30:57,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:30:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:30:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:30:57,303 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-26 21:30:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,542 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:30:57,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:30:57,543 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-26 21:30:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,544 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:30:57,544 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:30:57,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:30:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:30:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:30:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:30:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:30:57,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-26 21:30:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,549 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:30:57,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:30:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:30:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:30:57,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,549 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-26 21:30:57,550 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,550 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-26 21:30:57,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:57,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:58,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:58,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:58,628 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:58,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:58,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-26 21:30:59,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:30:59,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:30:59,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:30:59,955 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-26 21:31:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:00,143 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:31:00,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:31:00,143 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-26 21:31:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:00,144 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:31:00,144 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:31:00,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:31:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:31:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:31:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:31:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 21:31:00,148 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-26 21:31:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:00,148 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 21:31:00,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:31:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 21:31:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:31:00,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:00,149 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-26 21:31:00,149 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:00,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-26 21:31:00,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:00,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:00,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:00,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,184 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 [2018-09-26 21:31:01,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:01,241 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:31:01,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:01,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-26 21:31:02,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:31:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:31:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:31:02,970 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-26 21:31:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,175 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:31:03,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:31:03,175 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-26 21:31:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,176 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:31:03,177 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:31:03,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:31:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:31:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:31:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:31:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 21:31:03,182 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-26 21:31:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,182 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 21:31:03,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:31:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 21:31:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:31:03,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,183 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-26 21:31:03,183 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-26 21:31:03,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,304 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 [2018-09-26 21:31:04,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:04,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:31:04,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:04,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:05,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-26 21:31:05,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:31:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:31:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:31:05,717 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-26 21:31:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:05,988 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:31:05,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:31:05,989 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-26 21:31:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:05,989 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:31:05,990 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:31:05,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:31:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:31:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:31:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:31:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 21:31:05,994 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-26 21:31:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:05,994 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 21:31:05,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:31:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 21:31:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:31:05,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:05,995 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-26 21:31:05,995 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:05,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-26 21:31:05,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:05,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:05,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:05,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:05,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:07,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:07,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:10,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-26 21:31:10,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:31:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:31:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:31:10,057 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-26 21:31:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:10,308 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:31:10,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:31:10,308 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-26 21:31:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:10,311 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:31:10,311 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:31:10,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:31:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:31:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:31:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:31:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 21:31:10,318 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-26 21:31:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:10,318 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 21:31:10,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:31:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 21:31:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:31:10,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:10,319 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-26 21:31:10,319 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:10,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-26 21:31:10,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:10,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:10,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:10,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:11,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:11,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:11,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:11,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:11,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-26 21:31:13,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:31:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:31:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:31:13,380 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-26 21:31:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:14,990 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:31:14,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:31:14,991 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-26 21:31:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:14,991 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:31:14,992 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:31:14,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:31:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:31:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:31:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:31:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-26 21:31:15,000 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-26 21:31:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:15,000 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-26 21:31:15,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:31:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-26 21:31:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 21:31:15,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:15,003 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-26 21:31:15,003 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:15,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-26 21:31:15,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:15,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:15,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:15,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:16,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:16,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:31:16,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:16,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:18,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-26 21:31:18,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:31:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:31:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:31:18,684 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-26 21:31:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:18,919 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:31:18,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:31:18,920 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-26 21:31:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:18,921 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:31:18,921 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:31:18,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:31:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:31:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 21:31:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:31:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-26 21:31:18,927 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-26 21:31:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:18,927 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-26 21:31:18,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:31:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-26 21:31:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:31:18,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:18,928 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-26 21:31:18,928 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:18,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:18,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-26 21:31:18,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:18,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:18,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:18,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:20,313 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 [2018-09-26 21:31:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:20,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:20,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:20,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:22,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-26 21:31:22,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:31:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:31:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:31:22,399 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-26 21:31:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:22,653 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:31:22,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:31:22,654 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-26 21:31:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:22,655 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:31:22,655 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:31:22,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:31:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:31:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:31:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:31:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-26 21:31:22,660 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-26 21:31:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:22,660 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-26 21:31:22,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:31:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-26 21:31:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:31:22,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:22,661 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-26 21:31:22,661 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:22,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-26 21:31:22,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:22,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:22,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:22,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:23,983 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 [2018-09-26 21:31:24,000 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:24,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:31:24,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:24,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-26 21:31:26,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:31:26,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:31:26,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:31:26,023 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-26 21:31:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:26,249 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:31:26,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:31:26,249 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-26 21:31:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:26,251 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:31:26,251 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:31:26,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:31:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:31:26,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:31:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:31:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-26 21:31:26,256 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-26 21:31:26,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:26,256 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-26 21:31:26,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:31:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-26 21:31:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:31:26,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:26,257 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-26 21:31:26,257 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:26,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-26 21:31:26,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:26,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:26,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:26,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,466 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 [2018-09-26 21:31:28,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:28,530 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:31:28,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:28,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:30,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-26 21:31:30,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:31:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:31:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:31:30,366 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-26 21:31:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:30,623 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:31:30,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:31:30,624 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-26 21:31:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:30,625 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:31:30,625 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:31:30,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:31:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:31:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 21:31:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:31:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-26 21:31:30,631 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-26 21:31:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:30,632 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-26 21:31:30,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:31:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-26 21:31:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:31:30,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:30,633 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-26 21:31:30,633 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:30,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-26 21:31:30,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:30,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:32,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:32,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:32,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:34,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-26 21:31:34,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:31:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:31:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:31:34,119 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-26 21:31:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:34,636 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:31:34,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:31:34,636 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-26 21:31:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:34,637 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:31:34,637 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:31:34,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:31:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:31:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:31:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:31:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-26 21:31:34,644 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-26 21:31:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:34,644 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-26 21:31:34,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 21:31:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-26 21:31:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 21:31:34,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:34,645 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-26 21:31:34,646 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:34,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-26 21:31:34,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:34,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:34,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:34,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:36,166 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 [2018-09-26 21:31:36,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:36,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:36,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:36,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:38,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-26 21:31:38,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:31:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:31:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:31:38,432 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-26 21:31:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:38,743 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:31:38,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:31:38,743 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-26 21:31:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:38,745 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:31:38,745 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:31:38,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:31:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:31:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 21:31:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:31:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-26 21:31:38,758 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-26 21:31:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,759 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-26 21:31:38,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:31:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-26 21:31:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:31:38,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,760 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-26 21:31:38,760 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-26 21:31:38,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,266 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 [2018-09-26 21:31:40,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:40,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:31:40,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:42,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-26 21:31:42,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 21:31:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 21:31:42,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:31:42,259 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-26 21:31:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:42,521 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:31:42,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:31:42,521 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-26 21:31:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:42,522 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:31:42,523 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 21:31:42,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:31:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 21:31:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-26 21:31:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:31:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-26 21:31:42,527 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-26 21:31:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:42,527 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-26 21:31:42,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 21:31:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-26 21:31:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:31:42,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:42,528 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-26 21:31:42,528 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:42,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-26 21:31:42,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:42,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:42,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:44,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:44,862 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:44,897 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:44,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:44,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-26 21:31:46,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 21:31:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 21:31:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:31:46,953 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-26 21:31:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:47,234 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:31:47,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:31:47,235 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-26 21:31:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:47,235 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:31:47,235 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:31:47,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:31:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:31:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-26 21:31:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:31:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-26 21:31:47,240 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-26 21:31:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:47,240 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-26 21:31:47,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 21:31:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-26 21:31:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 21:31:47,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:47,241 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-26 21:31:47,241 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:47,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:47,242 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-26 21:31:47,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:47,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:47,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:47,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:49,135 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 [2018-09-26 21:31:49,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:49,208 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:31:49,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:49,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:51,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-26 21:31:51,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-26 21:31:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-26 21:31:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:31:51,383 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-26 21:31:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:51,650 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:31:51,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:31:51,651 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-26 21:31:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:51,652 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:31:51,652 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:31:51,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:31:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:31:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-26 21:31:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:31:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-26 21:31:51,657 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-26 21:31:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:51,658 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-26 21:31:51,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-26 21:31:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-26 21:31:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:31:51,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:51,659 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-26 21:31:51,659 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:51,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-26 21:31:51,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:51,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:51,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:51,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,756 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 [2018-09-26 21:31:53,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:53,844 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:31:53,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:53,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:55,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-26 21:31:55,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-26 21:31:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-26 21:31:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:31:55,926 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-26 21:31:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:56,182 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:31:56,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:31:56,183 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-26 21:31:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:56,184 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:31:56,184 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 21:31:56,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:31:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 21:31:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 21:31:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 21:31:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-26 21:31:56,189 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-26 21:31:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:56,189 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-26 21:31:56,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-26 21:31:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-26 21:31:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 21:31:56,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:56,190 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-26 21:31:56,190 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:56,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-26 21:31:56,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:56,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:56,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:56,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:57,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:57,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:57,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:00,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-26 21:32:00,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-26 21:32:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-26 21:32:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-26 21:32:00,292 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-26 21:32:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:00,593 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:32:00,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:32:00,593 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-26 21:32:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:00,594 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:32:00,595 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:32:00,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-26 21:32:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:32:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 21:32:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 21:32:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-26 21:32:00,599 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-26 21:32:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:00,600 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-26 21:32:00,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-26 21:32:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-26 21:32:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:32:00,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:00,600 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-26 21:32:00,601 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:00,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-26 21:32:00,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:00,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:00,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:00,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:03,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:03,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:03,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:03,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:03,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:06,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-26 21:32:06,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 21:32:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 21:32:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:32:06,021 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-26 21:32:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:06,272 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:32:06,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:32:06,272 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-26 21:32:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:06,273 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:32:06,273 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:32:06,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:32:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:32:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-26 21:32:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:32:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-26 21:32:06,278 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-26 21:32:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:06,278 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-26 21:32:06,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 21:32:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-26 21:32:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-26 21:32:06,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:06,279 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-26 21:32:06,280 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:06,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:06,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-26 21:32:06,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:06,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:06,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:06,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:09,127 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 [2018-09-26 21:32:09,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:09,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:32:09,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:09,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:11,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-26 21:32:11,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-26 21:32:11,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-26 21:32:11,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-26 21:32:11,461 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-26 21:32:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:11,765 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:32:11,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:32:11,766 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-26 21:32:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:11,767 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:32:11,767 INFO L226 Difference]: Without dead ends: 132 [2018-09-26 21:32:11,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-26 21:32:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-26 21:32:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-26 21:32:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-26 21:32:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-26 21:32:11,773 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-26 21:32:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:11,773 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-26 21:32:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-26 21:32:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-26 21:32:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-26 21:32:11,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:11,774 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-26 21:32:11,774 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:11,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-26 21:32:11,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:11,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:11,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:11,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:13,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:13,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:13,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:13,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:13,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:13,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:16,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-26 21:32:16,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 21:32:16,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 21:32:16,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:32:16,178 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-26 21:32:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:16,444 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:32:16,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:32:16,445 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-26 21:32:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:16,446 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:32:16,446 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:32:16,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:32:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:32:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-26 21:32:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 21:32:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-26 21:32:16,451 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-26 21:32:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:16,452 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-26 21:32:16,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 21:32:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-26 21:32:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:32:16,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:16,453 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-26 21:32:16,453 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:16,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-26 21:32:16,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:16,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:18,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:18,648 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 [2018-09-26 21:32:18,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:18,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:32:18,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:18,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:22,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-26 21:32:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-26 21:32:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-26 21:32:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:32:22,463 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-26 21:32:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:22,806 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:32:22,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:32:22,806 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-26 21:32:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:22,808 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:32:22,808 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:32:22,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:32:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:32:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:32:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:32:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-26 21:32:22,814 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-26 21:32:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:22,815 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-26 21:32:22,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-26 21:32:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-26 21:32:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 21:32:22,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:22,816 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-26 21:32:22,816 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:22,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-26 21:32:22,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:22,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:22,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:22,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:25,010 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 [2018-09-26 21:32:25,019 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:25,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:32:25,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:25,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:27,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-26 21:32:27,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-26 21:32:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-26 21:32:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:32:27,765 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-26 21:32:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:28,076 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:32:28,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:32:28,076 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-26 21:32:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:28,077 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:32:28,078 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:32:28,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:32:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:32:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-26 21:32:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-26 21:32:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-26 21:32:28,083 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-26 21:32:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:28,083 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-26 21:32:28,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-26 21:32:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-26 21:32:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:32:28,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:28,084 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-26 21:32:28,084 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:28,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-26 21:32:28,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:28,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:28,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:28,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:28,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:30,416 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 [2018-09-26 21:32:30,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:30,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:32,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:32,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-26 21:32:32,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-26 21:32:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-26 21:32:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-26 21:32:32,942 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-26 21:32:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:33,269 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:32:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:32:33,270 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-26 21:32:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:33,271 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:32:33,271 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 21:32:33,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-26 21:32:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 21:32:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-26 21:32:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:32:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-26 21:32:33,276 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-26 21:32:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:33,276 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-26 21:32:33,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-26 21:32:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-26 21:32:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-26 21:32:33,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:33,277 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-26 21:32:33,278 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:33,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-26 21:32:33,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:33,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:33,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:33,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:33,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:35,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:35,630 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 [2018-09-26 21:32:35,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:35,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:35,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:35,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:38,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-26 21:32:38,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-26 21:32:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-26 21:32:38,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:32:38,227 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-26 21:32:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:38,547 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:32:38,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:32:38,547 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-26 21:32:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:38,548 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:32:38,548 INFO L226 Difference]: Without dead ends: 142 [2018-09-26 21:32:38,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:32:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-26 21:32:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-26 21:32:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-26 21:32:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-26 21:32:38,553 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-26 21:32:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:38,553 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-26 21:32:38,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-26 21:32:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-26 21:32:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-26 21:32:38,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:38,554 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-26 21:32:38,554 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:38,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-26 21:32:38,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:38,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:38,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:38,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:40,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:40,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:40,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:41,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:32:41,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:41,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:43,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-26 21:32:43,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-26 21:32:43,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-26 21:32:43,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:32:43,719 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-26 21:32:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:44,084 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:32:44,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:32:44,085 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-26 21:32:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:44,086 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:32:44,086 INFO L226 Difference]: Without dead ends: 144 [2018-09-26 21:32:44,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:32:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-26 21:32:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-26 21:32:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-26 21:32:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-26 21:32:44,092 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-26 21:32:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:44,092 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-26 21:32:44,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-26 21:32:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-26 21:32:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:32:44,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:44,093 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-26 21:32:44,093 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:44,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-26 21:32:44,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:44,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:44,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:44,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:46,500 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 [2018-09-26 21:32:46,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:46,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:46,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:46,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:49,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:49,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-26 21:32:49,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-26 21:32:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-26 21:32:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:32:49,694 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-26 21:32:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:50,076 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:32:50,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:32:50,076 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-26 21:32:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:50,077 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:32:50,077 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:32:50,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:32:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:32:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-26 21:32:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-26 21:32:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-26 21:32:50,083 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-26 21:32:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:50,083 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-26 21:32:50,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-26 21:32:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-26 21:32:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-26 21:32:50,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:50,084 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-26 21:32:50,084 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:50,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-26 21:32:50,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:50,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:50,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:50,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:50,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:52,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:52,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:52,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:52,552 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:32:52,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:52,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:55,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:55,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-26 21:32:55,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-26 21:32:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-26 21:32:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:32:55,936 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-26 21:32:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:56,294 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:32:56,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:32:56,295 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-26 21:32:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:56,296 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:32:56,297 INFO L226 Difference]: Without dead ends: 148 [2018-09-26 21:32:56,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:32:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-26 21:32:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-26 21:32:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-26 21:32:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-26 21:32:56,303 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-26 21:32:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:56,303 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-26 21:32:56,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-26 21:32:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-26 21:32:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:32:56,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:56,304 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-26 21:32:56,304 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:56,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-26 21:32:56,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:56,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:56,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:56,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:59,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:59,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:59,097 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:59,190 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:32:59,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:59,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:02,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:02,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-26 21:33:02,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-26 21:33:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-26 21:33:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-26 21:33:02,292 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-26 21:33:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:02,825 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:33:02,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:33:02,826 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-26 21:33:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:02,827 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:33:02,827 INFO L226 Difference]: Without dead ends: 150 [2018-09-26 21:33:02,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-26 21:33:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-26 21:33:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-26 21:33:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-26 21:33:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-26 21:33:02,833 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-26 21:33:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:02,833 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-26 21:33:02,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-26 21:33:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-26 21:33:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-26 21:33:02,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:02,834 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-26 21:33:02,835 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:02,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-26 21:33:02,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:02,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:02,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:02,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:05,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:05,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:05,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:05,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:08,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-26 21:33:08,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-26 21:33:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-26 21:33:08,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-26 21:33:08,563 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-26 21:33:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:08,930 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:33:08,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:33:08,930 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-26 21:33:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:08,932 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:33:08,932 INFO L226 Difference]: Without dead ends: 152 [2018-09-26 21:33:08,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-26 21:33:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-26 21:33:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-26 21:33:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-26 21:33:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-26 21:33:08,938 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-26 21:33:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:08,938 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-26 21:33:08,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-26 21:33:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-26 21:33:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-26 21:33:08,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:08,939 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-26 21:33:08,939 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:08,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-26 21:33:08,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:08,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:08,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:11,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:11,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:11,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:11,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:11,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:11,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:14,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:14,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-26 21:33:14,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-26 21:33:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-26 21:33:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:33:14,625 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-26 21:33:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:15,116 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:33:15,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:33:15,116 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-26 21:33:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:15,117 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:33:15,117 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:33:15,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:33:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:33:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-26 21:33:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-26 21:33:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-26 21:33:15,121 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-26 21:33:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:15,121 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-26 21:33:15,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-26 21:33:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-26 21:33:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-26 21:33:15,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:15,122 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-26 21:33:15,122 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:15,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-26 21:33:15,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:15,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:15,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:15,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:15,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:17,642 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 [2018-09-26 21:33:17,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:17,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:33:17,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:17,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:21,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:21,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-26 21:33:21,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-26 21:33:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-26 21:33:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-26 21:33:21,190 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-26 21:33:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:21,600 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:33:21,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:33:21,601 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-26 21:33:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:21,602 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:33:21,602 INFO L226 Difference]: Without dead ends: 156 [2018-09-26 21:33:21,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-26 21:33:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-26 21:33:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-26 21:33:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-26 21:33:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-26 21:33:21,607 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-26 21:33:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:21,607 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-26 21:33:21,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-26 21:33:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-26 21:33:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-26 21:33:21,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:21,608 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-26 21:33:21,608 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:21,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-26 21:33:21,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:21,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:21,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:21,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:21,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:24,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:24,137 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 [2018-09-26 21:33:24,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:24,189 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:24,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:24,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:27,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:27,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-26 21:33:27,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-26 21:33:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-26 21:33:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:33:27,489 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-26 21:33:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:27,851 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:33:27,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:33:27,851 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-26 21:33:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:27,852 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:33:27,852 INFO L226 Difference]: Without dead ends: 158 [2018-09-26 21:33:27,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:33:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-26 21:33:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-26 21:33:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-26 21:33:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-26 21:33:27,858 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-26 21:33:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:27,858 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-26 21:33:27,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-26 21:33:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-26 21:33:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-26 21:33:27,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:27,859 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-26 21:33:27,859 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:27,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-26 21:33:27,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:27,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:27,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:27,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:30,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:30,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:30,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:30,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:33:30,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:30,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:34,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:34,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-26 21:33:34,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-26 21:33:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-26 21:33:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:33:34,098 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-26 21:33:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:34,478 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:33:34,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:33:34,478 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-26 21:33:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:34,480 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:33:34,480 INFO L226 Difference]: Without dead ends: 160 [2018-09-26 21:33:34,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:33:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-26 21:33:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-26 21:33:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:33:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-26 21:33:34,487 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-26 21:33:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:34,488 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-26 21:33:34,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-26 21:33:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-26 21:33:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-26 21:33:34,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:34,489 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-26 21:33:34,489 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:34,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-26 21:33:34,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:34,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:34,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:34,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:34,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:37,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:37,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:37,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:37,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:33:37,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:37,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:41,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-26 21:33:41,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-26 21:33:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-26 21:33:41,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:33:41,117 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-26 21:33:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:41,519 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:33:41,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:33:41,519 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-26 21:33:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:41,520 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:33:41,520 INFO L226 Difference]: Without dead ends: 162 [2018-09-26 21:33:41,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:33:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-26 21:33:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-26 21:33:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-26 21:33:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-26 21:33:41,526 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-26 21:33:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:41,527 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-26 21:33:41,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-26 21:33:41,527 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-26 21:33:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-26 21:33:41,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:41,528 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-26 21:33:41,528 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:41,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-26 21:33:41,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:41,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:41,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:41,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:44,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:44,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:44,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:44,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:48,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:48,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-26 21:33:48,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-26 21:33:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-26 21:33:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-26 21:33:48,012 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-26 21:33:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:48,408 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:33:48,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:33:48,409 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-26 21:33:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:48,410 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:33:48,410 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:33:48,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-26 21:33:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:33:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-26 21:33:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-26 21:33:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-26 21:33:48,417 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-26 21:33:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:48,417 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-26 21:33:48,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-26 21:33:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-26 21:33:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-26 21:33:48,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:48,418 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-26 21:33:48,419 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:48,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-26 21:33:48,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:48,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:48,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:48,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:33:50,165 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:33:50,169 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:33:50,169 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:33:50 BoogieIcfgContainer [2018-09-26 21:33:50,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:33:50,170 INFO L168 Benchmark]: Toolchain (without parser) took 237177.04 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -115.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 125.0 MB). Peak memory consumption was 457.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:33:50,172 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. [2018-09-26 21:33:50,172 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.71 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. [2018-09-26 21:33:50,173 INFO L168 Benchmark]: Boogie Preprocessor took 20.88 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. [2018-09-26 21:33:50,173 INFO L168 Benchmark]: RCFGBuilder took 268.91 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. [2018-09-26 21:33:50,174 INFO L168 Benchmark]: TraceAbstraction took 236840.32 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -115.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 103.8 MB). Peak memory consumption was 436.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:33:50,176 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 40.71 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 20.88 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 268.91 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 236840.32 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -115.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 103.8 MB). Peak memory consumption was 436.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.7s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 202.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 207.3s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-33-50-190.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-33-50-190.csv Completed graceful shutdown