java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:45:13,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:45:13,207 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:45:13,218 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-23 19:45:13,277 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 [2018-09-23 19:45:13,303 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:45:13,303 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:45:13,305 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:45:13,305 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:45:13,305 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:45:13,306 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:45:13,306 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:45:13,306 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:45:13,306 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:45:13,307 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:45:13,307 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:45:13,308 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:45:13,308 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:45:13,308 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:45:13,308 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:45:13,308 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:45:13,309 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:45:13,309 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:45:13,309 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:45:13,309 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:45:13,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:45:13,313 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:45:13,313 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:45:13,313 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:45:13,313 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:45:13,314 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:45:13,314 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:45:13,314 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:45:13,314 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:45:13,314 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:45:13,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:45:13,397 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:45:13,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:45:13,403 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:45:13,404 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:45:13,405 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-09-23 19:45:13,405 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-09-23 19:45:13,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:45:13,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:45:13,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:45:13,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:45:13,462 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:45:13,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:45:13,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:45:13,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:45:13,502 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:45:13,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/1) ... [2018-09-23 19:45:13,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:45:13,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:45:13,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:45:13,524 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:45:13,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (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 [2018-09-23 19:45:13,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:45:13,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:45:13,928 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:45:13,929 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:45:13 BoogieIcfgContainer [2018-09-23 19:45:13,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:45:13,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:45:13,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:45:13,934 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:45:13,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:45:13" (1/2) ... [2018-09-23 19:45:13,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439d8c77 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:45:13, skipping insertion in model container [2018-09-23 19:45:13,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:45:13" (2/2) ... [2018-09-23 19:45:13,939 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-09-23 19:45:13,949 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:45:13,958 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:45:14,010 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:45:14,011 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:45:14,011 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:45:14,011 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:45:14,011 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:45:14,011 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:45:14,012 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:45:14,012 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:45:14,012 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:45:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 19:45:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:45:14,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:14,035 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:45:14,037 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:14,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-09-23 19:45:14,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:14,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:14,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:14,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:14,290 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:45:14,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:45:14,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:45:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:45:14,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:45:14,332 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-23 19:45:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:14,457 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-23 19:45:14,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:45:14,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:45:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:14,469 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:45:14,469 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:45:14,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:45:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:45:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:45:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:45:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 19:45:14,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-23 19:45:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 19:45:14,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:45:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 19:45:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:45:14,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:14,517 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:45:14,517 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:14,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-09-23 19:45:14,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:14,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:14,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:14,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:14,806 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:45:14,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:45:14,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:45:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:45:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:45:14,810 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-23 19:45:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:14,958 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-23 19:45:14,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:45:14,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 19:45:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:14,959 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:45:14,960 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:45:14,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:45:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:45:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-23 19:45:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:45:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 19:45:14,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-23 19:45:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:14,967 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 19:45:14,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:45:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 19:45:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:45:14,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:14,968 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:45:14,969 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:14,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-09-23 19:45:14,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:14,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:14,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:14,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:15,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:15,158 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 [2018-09-23 19:45:15,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:15,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:15,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:15,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-23 19:45:15,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:45:15,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:45:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:45:15,631 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-09-23 19:45:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:15,870 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-23 19:45:15,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:45:15,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 19:45:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:15,873 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:45:15,873 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:45:15,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:45:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:45:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:45:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:45:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 19:45:15,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-23 19:45:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:15,880 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 19:45:15,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:45:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 19:45:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:45:15,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:15,882 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:45:15,882 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:15,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-09-23 19:45:15,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:15,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:15,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:15,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:15,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:16,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:16,038 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 [2018-09-23 19:45:16,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:16,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:16,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:16,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:16,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:16,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-23 19:45:16,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:45:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:45:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:45:16,235 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-23 19:45:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:16,410 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-23 19:45:16,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:45:16,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-23 19:45:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:16,412 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:45:16,412 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:45:16,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:45:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:45:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-23 19:45:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:45:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 19:45:16,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-23 19:45:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:16,419 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 19:45:16,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:45:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 19:45:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:45:16,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:16,420 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 19:45:16,420 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:16,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-09-23 19:45:16,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:16,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:16,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:16,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:16,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:16,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:16,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:16,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:16,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:45:16,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:16,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:17,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:17,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:45:17,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:45:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:45:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:45:17,045 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-09-23 19:45:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:17,300 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-23 19:45:17,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:45:17,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:45:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:17,303 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:45:17,304 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:45:17,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:45:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:45:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:45:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-23 19:45:17,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-23 19:45:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:17,309 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-23 19:45:17,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:45:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-23 19:45:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:45:17,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:17,311 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-23 19:45:17,311 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:17,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-09-23 19:45:17,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:17,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:17,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:17,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:17,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:17,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:17,439 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 [2018-09-23 19:45:17,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:17,465 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:17,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:17,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:17,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:17,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-23 19:45:17,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:45:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:45:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:45:17,522 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-23 19:45:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:17,649 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-23 19:45:17,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:45:17,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 19:45:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:17,651 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:45:17,651 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:45:17,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:45:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:45:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 19:45:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:45:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 19:45:17,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-23 19:45:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:17,657 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 19:45:17,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:45:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 19:45:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:45:17,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:17,658 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 19:45:17,659 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:17,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:17,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-09-23 19:45:17,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:17,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:17,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:17,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:17,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:17,962 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 [2018-09-23 19:45:17,978 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:18,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:45:18,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:18,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:18,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:18,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-23 19:45:18,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:45:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:45:18,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:45:18,214 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-09-23 19:45:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:18,390 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-23 19:45:18,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:45:18,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:45:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:18,391 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:45:18,391 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:45:18,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:45:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:45:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:45:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:45:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-23 19:45:18,397 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-23 19:45:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:18,397 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-23 19:45:18,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:45:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-23 19:45:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:45:18,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:18,399 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-23 19:45:18,399 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:18,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-09-23 19:45:18,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:18,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:18,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:18,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:18,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:18,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:18,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:18,517 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:18,543 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 19:45:18,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:18,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:18,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:18,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-23 19:45:18,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:45:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:45:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:45:18,594 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-23 19:45:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:18,764 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-23 19:45:18,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:45:18,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-23 19:45:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:18,767 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:45:18,767 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:45:18,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:45:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:45:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-23 19:45:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:45:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 19:45:18,775 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-23 19:45:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:18,776 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 19:45:18,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:45:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 19:45:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:45:18,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:18,777 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-23 19:45:18,777 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:18,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-09-23 19:45:18,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:18,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:18,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:18,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:18,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:18,969 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 [2018-09-23 19:45:18,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:18,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:19,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:19,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-23 19:45:19,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:45:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:45:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:45:19,285 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-09-23 19:45:19,689 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-23 19:45:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:19,692 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-23 19:45:19,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:45:19,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 19:45:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:19,693 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:45:19,693 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:45:19,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:45:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:45:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:45:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:45:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-23 19:45:19,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-23 19:45:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:19,700 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-23 19:45:19,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:45:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-23 19:45:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:45:19,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:19,701 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-23 19:45:19,702 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:19,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:19,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-09-23 19:45:19,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:19,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:19,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:19,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:19,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:20,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:20,002 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 [2018-09-23 19:45:20,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:20,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:20,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:20,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:20,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:20,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-23 19:45:20,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:45:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:45:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:45:20,073 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-23 19:45:20,404 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-09-23 19:45:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:20,493 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-23 19:45:20,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:45:20,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-23 19:45:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:20,496 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:45:20,496 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:45:20,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:45:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-23 19:45:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:45:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 19:45:20,503 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-23 19:45:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:20,504 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 19:45:20,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:45:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 19:45:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:45:20,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:20,505 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 19:45:20,505 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:20,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-09-23 19:45:20,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:20,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:20,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:20,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:20,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:20,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:20,953 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 [2018-09-23 19:45:20,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:20,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:45:20,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:21,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:21,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:21,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-23 19:45:21,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:45:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:45:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:45:21,397 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-09-23 19:45:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:21,889 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-23 19:45:21,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:45:21,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 19:45:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:21,889 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:45:21,889 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:45:21,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:45:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:45:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:45:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:45:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-23 19:45:21,896 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-23 19:45:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:21,896 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-23 19:45:21,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:45:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-23 19:45:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:45:21,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:21,897 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-23 19:45:21,897 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:21,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-09-23 19:45:21,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:21,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:21,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:21,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:21,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:22,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:22,086 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 [2018-09-23 19:45:22,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:22,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:22,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:22,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:22,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:22,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-23 19:45:22,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:45:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:45:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:45:22,167 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-23 19:45:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:22,425 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-23 19:45:22,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:45:22,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-23 19:45:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:22,426 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:45:22,426 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:45:22,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:45:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:45:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-23 19:45:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:45:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 19:45:22,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-23 19:45:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:22,434 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 19:45:22,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:45:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 19:45:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:45:22,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:22,435 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-23 19:45:22,435 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:22,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-09-23 19:45:22,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:22,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:22,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:22,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:22,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:22,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:22,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:45:22,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:22,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:22,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:22,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-23 19:45:22,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:45:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:45:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:45:22,989 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-09-23 19:45:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:23,400 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-23 19:45:23,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:45:23,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 19:45:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:23,401 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:45:23,401 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:45:23,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:45:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:45:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:45:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:45:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-23 19:45:23,408 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-23 19:45:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:23,408 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-23 19:45:23,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:45:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-23 19:45:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:45:23,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:23,409 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-23 19:45:23,409 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:23,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-09-23 19:45:23,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:23,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:23,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:23,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:23,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:23,682 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 [2018-09-23 19:45:23,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:23,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:45:23,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:23,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:23,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:23,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-23 19:45:23,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:45:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:45:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:45:23,771 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-23 19:45:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:24,100 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-23 19:45:24,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:45:24,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-23 19:45:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:24,102 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:45:24,103 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:45:24,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:45:24,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:45:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-23 19:45:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:45:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 19:45:24,110 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-23 19:45:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:24,111 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 19:45:24,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:45:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 19:45:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:45:24,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:24,112 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 19:45:24,112 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:24,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-09-23 19:45:24,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:24,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:24,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:24,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:24,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:24,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:24,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:24,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:24,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:24,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:24,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-23 19:45:24,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:45:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:45:24,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:45:24,693 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-09-23 19:45:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:25,191 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-23 19:45:25,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:45:25,192 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 19:45:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:25,192 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:45:25,192 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:45:25,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:45:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:45:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:45:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:45:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-23 19:45:25,200 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-23 19:45:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:25,200 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-23 19:45:25,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:45:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-23 19:45:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:45:25,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:25,201 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-23 19:45:25,201 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:25,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-09-23 19:45:25,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:25,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:25,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:25,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:25,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:25,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:25,328 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 [2018-09-23 19:45:25,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:25,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:25,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:25,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:25,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:25,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-23 19:45:25,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:45:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:45:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:45:25,437 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-23 19:45:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:25,977 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-23 19:45:25,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:45:25,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-23 19:45:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:25,980 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:45:25,980 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:45:25,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:45:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:45:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 19:45:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:45:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 19:45:25,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-23 19:45:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:25,988 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 19:45:25,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:45:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 19:45:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:45:25,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:25,989 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-23 19:45:25,990 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:25,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-09-23 19:45:25,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:25,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:25,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:25,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:25,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:26,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:26,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:26,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:26,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:45:26,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:26,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:26,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:26,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-23 19:45:26,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:45:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:45:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:45:26,772 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-09-23 19:45:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:27,420 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-23 19:45:27,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:45:27,420 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 19:45:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:27,421 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:45:27,421 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:45:27,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=1693, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:45:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:45:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:45:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:45:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-23 19:45:27,428 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-23 19:45:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:27,429 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-23 19:45:27,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:45:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-23 19:45:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:45:27,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:27,430 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-23 19:45:27,430 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:27,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-09-23 19:45:27,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:27,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:27,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:27,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:27,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:27,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:27,915 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 [2018-09-23 19:45:27,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:27,953 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:27,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:27,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:28,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:28,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-23 19:45:28,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:45:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:45:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:45:28,003 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-23 19:45:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:28,173 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-23 19:45:28,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:45:28,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-23 19:45:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:28,174 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:45:28,175 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:45:28,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:45:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:45:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-23 19:45:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:45:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 19:45:28,183 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-23 19:45:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:28,183 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 19:45:28,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:45:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 19:45:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:45:28,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:28,184 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 19:45:28,184 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:28,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-09-23 19:45:28,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:28,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:28,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:28,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:28,486 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 [2018-09-23 19:45:28,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:28,529 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:45:28,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:28,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:29,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:29,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-23 19:45:29,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:45:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:45:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:45:29,172 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-09-23 19:45:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:29,517 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-23 19:45:29,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:45:29,517 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 19:45:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:29,518 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:45:29,518 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:45:29,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:45:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:45:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:45:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:45:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-23 19:45:29,526 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-23 19:45:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:29,527 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-23 19:45:29,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:45:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-23 19:45:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:45:29,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:29,528 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-23 19:45:29,528 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:29,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-09-23 19:45:29,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:29,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:29,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:29,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:29,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:30,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:30,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:30,387 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:30,420 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-23 19:45:30,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:30,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:30,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:30,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-23 19:45:30,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:45:30,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:45:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:45:30,488 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-23 19:45:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:30,683 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-23 19:45:30,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:45:30,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-23 19:45:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:30,684 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:45:30,685 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:45:30,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:45:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:45:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-23 19:45:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:45:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 19:45:30,692 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-23 19:45:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:30,692 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 19:45:30,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:45:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 19:45:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:45:30,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:30,693 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-23 19:45:30,693 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:30,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-09-23 19:45:30,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:30,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:30,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:30,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:30,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:31,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:31,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:31,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:31,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:31,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:31,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-23 19:45:31,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:45:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:45:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:45:31,900 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-09-23 19:45:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:32,365 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-23 19:45:32,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:45:32,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 19:45:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:32,366 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:45:32,366 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:45:32,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=672, Invalid=2520, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:45:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:45:32,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:45:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:45:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-23 19:45:32,376 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-23 19:45:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:32,376 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-23 19:45:32,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:45:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-23 19:45:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:45:32,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:32,377 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-23 19:45:32,378 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:32,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-09-23 19:45:32,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:32,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:32,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:32,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:32,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:32,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:32,610 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 [2018-09-23 19:45:32,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:32,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:32,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:32,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:32,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:32,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-23 19:45:32,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:45:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:45:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:45:32,735 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-23 19:45:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:32,986 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-23 19:45:32,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:45:32,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-23 19:45:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:32,990 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:45:32,990 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:45:32,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:45:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:45:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-23 19:45:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:45:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 19:45:32,999 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-23 19:45:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:32,999 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 19:45:32,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:45:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 19:45:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:45:33,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:33,000 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 19:45:33,000 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:33,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-09-23 19:45:33,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:33,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:33,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:33,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:33,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:33,426 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 [2018-09-23 19:45:33,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:33,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:45:33,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:33,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:34,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:34,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-23 19:45:34,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:45:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:45:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1933, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:45:34,214 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-09-23 19:45:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:34,677 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-23 19:45:34,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:45:34,677 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 19:45:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:34,678 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:45:34,678 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:45:34,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=787, Invalid=2995, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:45:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:45:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:45:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:45:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-23 19:45:34,687 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-23 19:45:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:34,688 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-23 19:45:34,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:45:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-23 19:45:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:45:34,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:34,688 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-23 19:45:34,689 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:34,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-09-23 19:45:34,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:34,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:34,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:34,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:34,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:34,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:34,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:34,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:35,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:35,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:35,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:35,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:35,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-23 19:45:35,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:45:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:45:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:45:35,111 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-23 19:45:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:35,519 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-23 19:45:35,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:45:35,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-23 19:45:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:35,520 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:45:35,520 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:45:35,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:45:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:45:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-23 19:45:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:45:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 19:45:35,528 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-23 19:45:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:35,528 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 19:45:35,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:45:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 19:45:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:45:35,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:35,529 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-23 19:45:35,529 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:35,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-09-23 19:45:35,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:35,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:35,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:35,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:35,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:35,895 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 [2018-09-23 19:45:35,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:35,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:45:35,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:35,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:36,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:36,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-23 19:45:36,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:45:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:45:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:45:36,524 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-09-23 19:45:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:37,017 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-23 19:45:37,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:45:37,018 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 19:45:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:37,019 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:45:37,019 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:45:37,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:45:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:45:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:45:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:45:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-23 19:45:37,029 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-23 19:45:37,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:37,029 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-23 19:45:37,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:45:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-23 19:45:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:45:37,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:37,030 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-23 19:45:37,030 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:37,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-09-23 19:45:37,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:37,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:37,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:37,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:37,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:37,343 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 [2018-09-23 19:45:37,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:37,396 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:45:37,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:37,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:37,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:37,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-23 19:45:37,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:45:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:45:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:45:37,460 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-23 19:45:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:37,741 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-23 19:45:37,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:45:37,742 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-23 19:45:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:37,743 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:45:37,743 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:45:37,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:45:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:45:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 19:45:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:45:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 19:45:37,752 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-23 19:45:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:37,752 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 19:45:37,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:45:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 19:45:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:45:37,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:37,753 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 19:45:37,754 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:37,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:37,754 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-09-23 19:45:37,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:37,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:37,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:37,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:38,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:38,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:38,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:38,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:39,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:39,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-23 19:45:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:45:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:45:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=2619, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:45:39,554 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-09-23 19:45:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:40,503 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-23 19:45:40,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:45:40,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 19:45:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:40,504 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:45:40,504 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:45:40,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1044, Invalid=4068, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:45:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:45:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:45:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:45:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-23 19:45:40,512 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-23 19:45:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:40,512 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-23 19:45:40,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:45:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-23 19:45:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:45:40,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:40,513 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-23 19:45:40,513 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:40,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-09-23 19:45:40,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:40,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:40,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:40,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:40,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:40,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:40,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:40,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:40,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:40,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:40,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:40,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-23 19:45:40,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:45:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:45:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:45:40,843 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-23 19:45:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:41,126 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-23 19:45:41,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:45:41,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-23 19:45:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:41,127 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:45:41,127 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:45:41,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:45:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:45:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-23 19:45:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:45:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 19:45:41,136 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-23 19:45:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:41,136 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 19:45:41,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:45:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 19:45:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:45:41,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:41,137 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-23 19:45:41,137 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:41,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-09-23 19:45:41,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:41,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:41,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:42,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:42,093 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 [2018-09-23 19:45:42,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:42,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:45:42,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:42,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:43,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:43,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-23 19:45:43,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:45:43,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:45:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:45:43,647 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-09-23 19:45:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:44,813 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-23 19:45:44,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:45:44,813 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 19:45:44,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:44,813 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:45:44,814 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:45:44,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1186, Invalid=4666, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:45:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:45:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:45:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:45:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-23 19:45:44,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-23 19:45:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:44,824 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-23 19:45:44,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:45:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-23 19:45:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:45:44,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:44,825 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-23 19:45:44,825 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:44,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-09-23 19:45:44,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:44,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:44,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:45,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:45,095 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 [2018-09-23 19:45:45,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:45,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:45,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:45,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:45,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:45,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-23 19:45:45,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:45:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:45:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:45:45,285 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-23 19:45:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:45,709 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-23 19:45:45,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:45:45,710 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-23 19:45:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:45,711 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:45:45,711 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:45:45,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:45:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:45:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-23 19:45:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:45:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 19:45:45,721 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-23 19:45:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:45,721 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 19:45:45,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:45:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 19:45:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:45:45,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:45,722 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 19:45:45,722 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:45,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-09-23 19:45:45,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:45,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:45,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:45,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:45,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:46,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:46,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:46,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:46,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:45:46,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:46,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:47,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:47,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-23 19:45:47,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:45:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:45:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:45:47,232 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-09-23 19:45:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:48,224 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-23 19:45:48,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:45:48,224 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 19:45:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:48,225 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:45:48,225 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:45:48,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1337, Invalid=5305, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:45:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:45:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:45:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:45:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-23 19:45:48,234 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-23 19:45:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:48,234 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-23 19:45:48,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:45:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-23 19:45:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:45:48,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:48,234 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-23 19:45:48,235 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:48,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-09-23 19:45:48,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:48,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:48,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:48,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:48,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:49,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:49,174 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 [2018-09-23 19:45:49,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:45:49,335 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-23 19:45:49,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:49,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:49,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:49,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-23 19:45:49,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:45:49,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:45:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:45:49,413 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-23 19:45:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:49,702 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-23 19:45:49,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:45:49,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-23 19:45:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:49,703 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:45:49,704 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:45:49,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:45:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:45:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-23 19:45:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:45:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 19:45:49,717 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-23 19:45:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:49,717 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 19:45:49,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:45:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 19:45:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:45:49,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:49,718 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-23 19:45:49,719 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:49,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-09-23 19:45:49,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:49,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:49,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:49,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:49,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:50,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:50,376 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 [2018-09-23 19:45:50,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:50,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:51,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:51,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-23 19:45:51,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:45:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:45:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=3843, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:45:51,607 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-09-23 19:45:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:52,724 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-23 19:45:52,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:45:52,724 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 19:45:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:52,725 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:45:52,725 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:45:52,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2569 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1497, Invalid=5985, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:45:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:45:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:45:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:45:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-23 19:45:52,735 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-23 19:45:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:52,736 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-23 19:45:52,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:45:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-23 19:45:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:45:52,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:52,736 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-23 19:45:52,736 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:52,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-09-23 19:45:52,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:52,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:52,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:52,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:45:52,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:53,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:53,027 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 [2018-09-23 19:45:53,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:45:53,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:45:53,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:53,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:53,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:53,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-23 19:45:53,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:45:53,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:45:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:45:53,155 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-23 19:45:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:53,523 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-23 19:45:53,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:45:53,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-23 19:45:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:53,525 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:45:53,525 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:45:53,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:45:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:45:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-23 19:45:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:45:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 19:45:53,536 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-23 19:45:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:53,536 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 19:45:53,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:45:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 19:45:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:45:53,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:53,537 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 19:45:53,537 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:53,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-09-23 19:45:53,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:53,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:53,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:53,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:53,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:54,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:54,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:45:54,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:45:54,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:45:54,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:54,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:55,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:55,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-23 19:45:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:45:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:45:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=4303, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:45:55,194 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-09-23 19:45:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:56,592 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-23 19:45:56,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:45:56,593 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 19:45:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:56,594 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:45:56,594 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:45:56,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1666, Invalid=6706, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:45:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:45:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:45:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:45:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-23 19:45:56,607 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-23 19:45:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:56,608 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-23 19:45:56,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:45:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-23 19:45:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:45:56,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:56,609 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-23 19:45:56,609 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:56,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-09-23 19:45:56,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:56,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:56,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:56,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:56,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:56,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:56,901 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 [2018-09-23 19:45:56,909 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:45:56,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:45:56,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:56,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:57,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:57,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-23 19:45:57,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:45:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:45:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:45:57,011 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-23 19:45:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:45:57,366 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-23 19:45:57,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:45:57,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-23 19:45:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:45:57,367 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:45:57,368 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:45:57,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:45:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:45:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 19:45:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:45:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 19:45:57,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-23 19:45:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:45:57,380 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 19:45:57,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:45:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 19:45:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:45:57,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:45:57,381 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-23 19:45:57,381 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:45:57,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:45:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-09-23 19:45:57,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:45:57,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:45:57,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:45:57,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:45:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:45:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:58,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:45:58,080 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 [2018-09-23 19:45:58,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:45:58,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:45:58,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:45:58,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:45:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:45:59,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:45:59,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-23 19:45:59,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:45:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:45:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=4789, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:45:59,286 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-09-23 19:46:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:00,344 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-23 19:46:00,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:46:00,344 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 19:46:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:00,345 INFO L225 Difference]: With dead ends: 122 [2018-09-23 19:46:00,345 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:46:00,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1844, Invalid=7468, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:46:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:46:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:46:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:46:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-23 19:46:00,356 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-23 19:46:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:00,357 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-23 19:46:00,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:46:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-23 19:46:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:46:00,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:00,358 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-23 19:46:00,358 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:00,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-09-23 19:46:00,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:00,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:00,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:00,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:00,915 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 [2018-09-23 19:46:00,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:00,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 19:46:00,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:00,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:01,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:01,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-23 19:46:01,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:46:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:46:01,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:46:01,060 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-23 19:46:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:01,615 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-23 19:46:01,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:46:01,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-23 19:46:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:01,626 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:46:01,626 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:46:01,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:46:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:46:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-23 19:46:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:46:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 19:46:01,644 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-23 19:46:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:01,644 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 19:46:01,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:46:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 19:46:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:46:01,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:01,645 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 19:46:01,645 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:01,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-09-23 19:46:01,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:01,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:01,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:01,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:01,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:02,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:02,356 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 [2018-09-23 19:46:02,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:02,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:03,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:03,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-23 19:46:03,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:46:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:46:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=5301, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:46:03,649 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-09-23 19:46:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:05,083 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-23 19:46:05,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:46:05,084 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 19:46:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:05,084 INFO L225 Difference]: With dead ends: 128 [2018-09-23 19:46:05,084 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:46:05,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2031, Invalid=8271, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:46:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:46:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:46:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:46:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-23 19:46:05,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-23 19:46:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:05,100 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-23 19:46:05,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:46:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-23 19:46:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:46:05,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:05,101 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-23 19:46:05,101 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:05,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-09-23 19:46:05,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:05,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:05,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:05,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:05,426 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 [2018-09-23 19:46:05,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:05,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:05,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:05,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:05,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:05,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-23 19:46:05,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:46:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:46:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:46:05,553 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-23 19:46:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:06,150 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-23 19:46:06,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:46:06,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-23 19:46:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:06,155 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:46:06,155 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:46:06,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:46:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:46:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-23 19:46:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:46:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 19:46:06,174 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-23 19:46:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:06,174 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 19:46:06,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:46:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 19:46:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:46:06,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:06,175 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-23 19:46:06,175 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:06,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:06,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-09-23 19:46:06,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:06,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:06,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:06,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:06,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:07,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:07,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:07,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:07,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:46:07,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:07,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:08,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:08,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-23 19:46:08,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:46:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:46:08,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1471, Invalid=5839, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:46:08,998 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-09-23 19:46:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:10,199 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-23 19:46:10,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:46:10,199 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 19:46:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:10,200 INFO L225 Difference]: With dead ends: 134 [2018-09-23 19:46:10,200 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:46:10,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2227, Invalid=9115, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:46:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:46:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:46:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:46:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-23 19:46:10,212 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-23 19:46:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:10,213 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-23 19:46:10,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:46:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-23 19:46:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:46:10,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:10,213 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-23 19:46:10,213 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:10,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-09-23 19:46:10,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:10,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:10,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:10,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:10,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:10,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:10,664 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 [2018-09-23 19:46:10,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:10,731 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:10,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:10,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:10,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:10,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-23 19:46:10,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:46:10,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:46:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:46:10,792 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-23 19:46:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:11,416 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-23 19:46:11,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:46:11,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-23 19:46:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:11,417 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:46:11,417 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:46:11,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:46:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:46:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-23 19:46:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:46:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 19:46:11,431 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-23 19:46:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:11,431 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 19:46:11,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:46:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 19:46:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:46:11,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:11,432 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 19:46:11,432 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:11,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:11,432 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-09-23 19:46:11,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:11,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:11,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:11,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:11,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:12,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:12,289 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 [2018-09-23 19:46:12,297 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:12,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:46:12,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:12,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:13,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:13,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-09-23 19:46:13,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:46:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:46:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=6403, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:46:13,933 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-09-23 19:46:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:15,311 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-23 19:46:15,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:46:15,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 19:46:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:15,312 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:46:15,312 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:46:15,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2432, Invalid=10000, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:46:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:46:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:46:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:46:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-23 19:46:15,326 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-23 19:46:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:15,326 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-23 19:46:15,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:46:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-23 19:46:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:46:15,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:15,327 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-23 19:46:15,327 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:15,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-09-23 19:46:15,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:15,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:15,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:15,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:15,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:15,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:15,790 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 [2018-09-23 19:46:15,797 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:15,864 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-23 19:46:15,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:15,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:15,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:15,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-23 19:46:15,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:46:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:46:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:46:15,927 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-23 19:46:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:16,496 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-23 19:46:16,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:46:16,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-23 19:46:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:16,498 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:46:16,498 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:46:16,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:46:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:46:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-23 19:46:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:46:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 19:46:16,513 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-23 19:46:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:16,513 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 19:46:16,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:46:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 19:46:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:46:16,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:16,514 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-23 19:46:16,515 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:16,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-09-23 19:46:16,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:16,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:16,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:16,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:16,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:17,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:17,449 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 [2018-09-23 19:46:17,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:17,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:19,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:19,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-09-23 19:46:19,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:46:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:46:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1749, Invalid=6993, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:46:19,126 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-09-23 19:46:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:20,924 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-23 19:46:20,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:46:20,925 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 19:46:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:20,925 INFO L225 Difference]: With dead ends: 146 [2018-09-23 19:46:20,926 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:46:20,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4786 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2646, Invalid=10926, Unknown=0, NotChecked=0, Total=13572 [2018-09-23 19:46:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:46:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:46:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:46:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-23 19:46:20,940 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-23 19:46:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:20,940 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-23 19:46:20,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:46:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-23 19:46:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:46:20,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:20,941 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-23 19:46:20,941 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:20,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-09-23 19:46:20,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:20,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:20,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:20,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:20,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:21,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:21,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:21,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:21,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:21,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:21,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:21,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:21,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-23 19:46:21,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:46:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:46:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:46:21,669 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-23 19:46:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:22,124 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-23 19:46:22,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:46:22,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-23 19:46:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:22,126 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:46:22,126 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:46:22,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:46:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:46:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 19:46:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:46:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 19:46:22,142 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-23 19:46:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:22,142 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 19:46:22,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:46:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 19:46:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:46:22,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:22,142 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 19:46:22,143 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:22,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-09-23 19:46:22,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:22,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:22,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:22,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:22,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:23,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:23,494 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 [2018-09-23 19:46:23,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:23,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:46:23,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:23,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:27,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:27,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-09-23 19:46:27,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:46:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:46:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=7609, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:46:27,261 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-09-23 19:46:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:28,748 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-23 19:46:28,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:46:28,748 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 19:46:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:28,749 INFO L225 Difference]: With dead ends: 152 [2018-09-23 19:46:28,749 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:46:28,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5222 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2869, Invalid=11893, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:46:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:46:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:46:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:46:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-23 19:46:28,765 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-23 19:46:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:28,765 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-23 19:46:28,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:46:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-23 19:46:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:46:28,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:28,766 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-23 19:46:28,766 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-09-23 19:46:28,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:28,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:28,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:29,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:29,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:29,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:29,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:29,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:29,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:29,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:29,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-23 19:46:29,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:46:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:46:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:46:29,345 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-23 19:46:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:30,425 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-23 19:46:30,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:46:30,426 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-23 19:46:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:30,427 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:46:30,427 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:46:30,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:46:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:46:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-23 19:46:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:46:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 19:46:30,448 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-23 19:46:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:30,448 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 19:46:30,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:46:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 19:46:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:46:30,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:30,449 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-23 19:46:30,449 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:30,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-09-23 19:46:30,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:30,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:30,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:30,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:31,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:31,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:31,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:31,993 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:46:31,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:31,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:34,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:34,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-09-23 19:46:34,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:46:34,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:46:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=8251, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:46:34,022 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-09-23 19:46:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:35,451 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-23 19:46:35,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:46:35,451 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 19:46:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:35,452 INFO L225 Difference]: With dead ends: 158 [2018-09-23 19:46:35,452 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:46:35,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3101, Invalid=12901, Unknown=0, NotChecked=0, Total=16002 [2018-09-23 19:46:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:46:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:46:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:46:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-23 19:46:35,473 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-23 19:46:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:35,473 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-23 19:46:35,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:46:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-23 19:46:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:46:35,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:35,474 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-23 19:46:35,474 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:35,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-09-23 19:46:35,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:35,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:35,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:35,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:35,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:36,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:36,461 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 [2018-09-23 19:46:36,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:36,550 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:46:36,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:36,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:36,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:36,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-23 19:46:36,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:46:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:46:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:46:36,636 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-23 19:46:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:37,253 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-23 19:46:37,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:46:37,253 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-23 19:46:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:37,254 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:46:37,254 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:46:37,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:46:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:46:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-23 19:46:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:46:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 19:46:37,278 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-23 19:46:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:37,278 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 19:46:37,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:46:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 19:46:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:46:37,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:37,279 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 19:46:37,279 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:37,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-09-23 19:46:37,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:37,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:37,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:37,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:38,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:38,455 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 [2018-09-23 19:46:38,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:38,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:40,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:40,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-09-23 19:46:40,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:46:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:46:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=8919, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:46:40,583 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-09-23 19:46:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:42,426 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-23 19:46:42,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:46:42,426 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 19:46:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:42,427 INFO L225 Difference]: With dead ends: 164 [2018-09-23 19:46:42,427 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:46:42,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6151 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3342, Invalid=13950, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:46:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:46:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:46:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:46:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-23 19:46:42,445 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-23 19:46:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:42,445 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-23 19:46:42,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:46:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-23 19:46:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:46:42,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:42,446 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-23 19:46:42,446 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:42,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-09-23 19:46:42,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:42,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:42,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:42,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:43,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:43,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:43,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:46:43,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:46:43,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:43,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:43,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:43,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-23 19:46:43,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:46:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:46:43,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:46:43,178 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-23 19:46:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:43,719 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-23 19:46:43,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:46:43,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-23 19:46:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:43,721 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:46:43,721 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:46:43,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:46:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:46:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-23 19:46:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:46:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 19:46:43,740 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-23 19:46:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:43,740 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 19:46:43,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:46:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 19:46:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:46:43,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:43,741 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-23 19:46:43,742 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:43,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-09-23 19:46:43,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:43,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:43,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:43,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:44,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:44,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:44,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:46:44,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:46:44,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:44,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:47,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:47,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-09-23 19:46:47,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:46:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:46:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2377, Invalid=9613, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:46:47,296 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-09-23 19:46:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:49,443 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-23 19:46:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:46:49,443 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 19:46:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:49,443 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:46:49,444 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:46:49,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6644 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3592, Invalid=15040, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 19:46:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:46:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:46:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:46:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-23 19:46:49,467 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-23 19:46:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:49,467 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-23 19:46:49,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:46:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-23 19:46:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:46:49,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:49,468 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-23 19:46:49,468 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:49,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-09-23 19:46:49,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:49,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:49,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:49,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:50,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:50,038 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 [2018-09-23 19:46:50,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:46:50,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:46:50,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:50,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:50,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:50,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-23 19:46:50,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:46:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:46:50,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:46:50,287 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-23 19:46:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:50,843 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-23 19:46:50,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:46:50,844 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-23 19:46:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:50,845 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:46:50,845 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:46:50,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:46:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:46:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-23 19:46:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:46:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 19:46:50,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-23 19:46:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:50,867 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 19:46:50,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:46:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 19:46:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:46:50,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:50,867 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 19:46:50,868 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:50,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-09-23 19:46:50,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:50,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:50,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:52,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:52,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:46:52,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:46:52,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:46:52,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:52,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:54,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:54,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-09-23 19:46:54,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:46:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:46:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=10333, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:46:54,629 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-09-23 19:46:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:55,733 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-23 19:46:55,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:46:55,733 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-23 19:46:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:55,734 INFO L225 Difference]: With dead ends: 176 [2018-09-23 19:46:55,734 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:46:55,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3851, Invalid=16171, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:46:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:46:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:46:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:46:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-23 19:46:55,755 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-23 19:46:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:55,755 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-23 19:46:55,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:46:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-23 19:46:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:46:55,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:55,756 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-23 19:46:55,756 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:55,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-09-23 19:46:55,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:55,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:55,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:55,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:56,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:56,230 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 [2018-09-23 19:46:56,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:46:56,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-23 19:46:56,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:46:56,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:46:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:56,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:46:56,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-23 19:46:56,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:46:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:46:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:46:56,494 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-23 19:46:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:46:57,218 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-23 19:46:57,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:46:57,222 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-23 19:46:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:46:57,223 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:46:57,223 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:46:57,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:46:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:46:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 19:46:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:46:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 19:46:57,242 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-23 19:46:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:46:57,243 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 19:46:57,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:46:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 19:46:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:46:57,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:46:57,243 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-23 19:46:57,243 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:46:57,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:46:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-09-23 19:46:57,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:46:57,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:46:57,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:57,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:46:57,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:46:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:46:58,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:46:58,777 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 [2018-09-23 19:46:58,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:46:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:46:58,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:01,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:01,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-09-23 19:47:01,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 19:47:01,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 19:47:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=11079, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:47:01,982 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-09-23 19:47:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:05,227 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-23 19:47:05,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:47:05,228 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-23 19:47:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:05,228 INFO L225 Difference]: With dead ends: 182 [2018-09-23 19:47:05,228 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:47:05,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4119, Invalid=17343, Unknown=0, NotChecked=0, Total=21462 [2018-09-23 19:47:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:47:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:47:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:47:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-23 19:47:05,257 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-23 19:47:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:05,257 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-23 19:47:05,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 19:47:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-23 19:47:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:47:05,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:05,258 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-23 19:47:05,258 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:05,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-09-23 19:47:05,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:05,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:05,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:05,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:06,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:06,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:06,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:06,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:06,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:06,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:06,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:06,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-23 19:47:06,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:47:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:47:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:47:06,455 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-23 19:47:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:07,080 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-23 19:47:07,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:47:07,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-23 19:47:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:07,081 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:47:07,081 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:47:07,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:47:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:47:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-23 19:47:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:47:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 19:47:07,104 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-23 19:47:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:07,104 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 19:47:07,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:47:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 19:47:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:47:07,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:07,105 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 19:47:07,105 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:07,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-09-23 19:47:07,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:07,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:07,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:07,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:07,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:08,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:08,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:08,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:08,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:47:08,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:08,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:11,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:11,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-09-23 19:47:11,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 19:47:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 19:47:11,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=11851, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:47:11,298 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-09-23 19:47:13,954 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-23 19:47:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:15,231 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-23 19:47:15,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:47:15,231 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-23 19:47:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:15,232 INFO L225 Difference]: With dead ends: 188 [2018-09-23 19:47:15,232 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:47:15,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8237 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4396, Invalid=18556, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:47:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:47:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:47:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:47:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-23 19:47:15,270 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-23 19:47:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:15,270 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-23 19:47:15,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 19:47:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-23 19:47:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:47:15,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:15,271 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-23 19:47:15,271 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:15,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-09-23 19:47:15,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:15,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:15,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:15,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:15,956 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 [2018-09-23 19:47:15,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:16,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:16,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:16,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:16,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:16,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-23 19:47:16,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:47:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:47:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:47:16,122 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-23 19:47:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:16,766 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-23 19:47:16,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:47:16,769 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-23 19:47:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:16,769 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:47:16,770 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:47:16,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:47:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:47:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-23 19:47:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:47:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-23 19:47:16,792 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-23 19:47:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:16,792 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-23 19:47:16,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:47:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-23 19:47:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:47:16,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:16,793 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-23 19:47:16,793 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:16,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-09-23 19:47:16,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:16,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:16,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:16,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:16,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:18,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:18,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:18,533 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:18,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:47:18,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:18,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:21,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:21,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-09-23 19:47:21,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 19:47:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 19:47:21,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3101, Invalid=12649, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:47:21,276 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-09-23 19:47:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:24,317 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-23 19:47:24,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:47:24,317 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-23 19:47:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:24,318 INFO L225 Difference]: With dead ends: 194 [2018-09-23 19:47:24,318 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:47:24,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8806 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4682, Invalid=19810, Unknown=0, NotChecked=0, Total=24492 [2018-09-23 19:47:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:47:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:47:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:47:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-23 19:47:24,341 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-23 19:47:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:24,341 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-23 19:47:24,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 19:47:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-23 19:47:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:47:24,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:24,342 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-23 19:47:24,342 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:24,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-09-23 19:47:24,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:24,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:24,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:24,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:24,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:24,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:24,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:24,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:24,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 19:47:24,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:24,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:25,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:25,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-23 19:47:25,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:47:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:47:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:47:25,095 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-23 19:47:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:25,779 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-23 19:47:25,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:47:25,779 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-23 19:47:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:25,780 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:47:25,780 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:47:25,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:47:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:47:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-23 19:47:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:47:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 19:47:25,808 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-23 19:47:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:25,808 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 19:47:25,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:47:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 19:47:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:47:25,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:25,809 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 19:47:25,809 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:25,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-09-23 19:47:25,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:25,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:25,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:27,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:27,317 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 [2018-09-23 19:47:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:27,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:30,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:30,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-09-23 19:47:30,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 19:47:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 19:47:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3297, Invalid=13473, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:47:30,504 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-09-23 19:47:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:32,184 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-23 19:47:32,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:47:32,184 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-23 19:47:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:32,184 INFO L225 Difference]: With dead ends: 200 [2018-09-23 19:47:32,185 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:47:32,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9394 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4977, Invalid=21105, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:47:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:47:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:47:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:47:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-23 19:47:32,210 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-23 19:47:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:32,210 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-23 19:47:32,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 19:47:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-23 19:47:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:47:32,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:32,211 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-23 19:47:32,211 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:32,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-09-23 19:47:32,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:32,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:32,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:32,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:32,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:32,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:32,765 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 [2018-09-23 19:47:32,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:47:32,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:47:32,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:32,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:33,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:33,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-23 19:47:33,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:47:33,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:47:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:47:33,047 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-23 19:47:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:33,813 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-23 19:47:33,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:47:33,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-23 19:47:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:33,814 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:47:33,814 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:47:33,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:47:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:47:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-23 19:47:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:47:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-23 19:47:33,841 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-23 19:47:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:33,841 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-23 19:47:33,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:47:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-23 19:47:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:47:33,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:33,842 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-23 19:47:33,843 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:33,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-09-23 19:47:33,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:33,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:33,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:35,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:35,507 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 [2018-09-23 19:47:35,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:47:35,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:47:35,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:35,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:38,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:38,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-09-23 19:47:38,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 19:47:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 19:47:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3499, Invalid=14323, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:47:38,992 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-09-23 19:47:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:42,930 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-23 19:47:42,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:47:42,931 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-23 19:47:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:42,931 INFO L225 Difference]: With dead ends: 206 [2018-09-23 19:47:42,931 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:47:42,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10001 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5281, Invalid=22441, Unknown=0, NotChecked=0, Total=27722 [2018-09-23 19:47:42,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:47:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:47:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:47:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-23 19:47:42,955 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-23 19:47:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:42,955 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-23 19:47:42,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 19:47:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-23 19:47:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:47:42,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:42,956 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-23 19:47:42,956 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:42,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-09-23 19:47:42,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:42,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:42,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:42,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:42,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:43,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:43,784 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 [2018-09-23 19:47:43,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:47:43,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:47:43,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:43,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:43,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:43,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-23 19:47:43,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:47:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:47:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:47:43,979 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-23 19:47:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:44,780 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-23 19:47:44,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:47:44,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-23 19:47:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:44,782 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:47:44,782 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:47:44,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:47:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:47:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 19:47:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:47:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 19:47:44,813 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-23 19:47:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:44,813 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 19:47:44,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:47:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 19:47:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:47:44,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:44,814 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 19:47:44,814 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:44,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-09-23 19:47:44,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:44,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:44,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:44,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:44,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:46,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:46,370 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 [2018-09-23 19:47:46,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:47:46,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:47:46,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:46,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:49,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:49,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-09-23 19:47:49,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 19:47:49,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 19:47:49,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3707, Invalid=15199, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:47:49,893 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-09-23 19:47:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:52,955 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-23 19:47:52,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:47:52,956 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-23 19:47:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:52,956 INFO L225 Difference]: With dead ends: 212 [2018-09-23 19:47:52,956 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:47:52,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10627 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5594, Invalid=23818, Unknown=0, NotChecked=0, Total=29412 [2018-09-23 19:47:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:47:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:47:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:47:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-23 19:47:52,984 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-23 19:47:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:52,984 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-23 19:47:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 19:47:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-23 19:47:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:47:52,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:52,984 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-23 19:47:52,985 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:52,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-09-23 19:47:52,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:52,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:52,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:52,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:53,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:53,880 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 [2018-09-23 19:47:53,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:47:54,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-23 19:47:54,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:47:54,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:47:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:54,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:47:54,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-23 19:47:54,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:47:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:47:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:47:54,067 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-23 19:47:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:47:54,897 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-23 19:47:54,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:47:54,898 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-23 19:47:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:47:54,899 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:47:54,899 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:47:54,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:47:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:47:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-23 19:47:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:47:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-23 19:47:54,930 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-23 19:47:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:47:54,931 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-23 19:47:54,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:47:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-23 19:47:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:47:54,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:47:54,931 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-23 19:47:54,932 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:47:54,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:47:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-09-23 19:47:54,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:47:54,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:47:54,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:54,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:47:54,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:47:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:47:56,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:47:56,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:47:56,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:47:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:47:56,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:00,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:00,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-09-23 19:48:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 19:48:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 19:48:00,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=16101, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:48:00,297 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-09-23 19:48:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:04,560 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-23 19:48:04,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:48:04,560 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-23 19:48:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:04,560 INFO L225 Difference]: With dead ends: 218 [2018-09-23 19:48:04,561 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:48:04,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11272 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5916, Invalid=25236, Unknown=0, NotChecked=0, Total=31152 [2018-09-23 19:48:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:48:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:48:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:48:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-23 19:48:04,593 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-23 19:48:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:04,593 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-23 19:48:04,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 19:48:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-23 19:48:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:48:04,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:04,594 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-23 19:48:04,594 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:04,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-09-23 19:48:04,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:04,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:04,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:04,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:04,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:05,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:05,280 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 [2018-09-23 19:48:05,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:05,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:05,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:05,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:05,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:05,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-23 19:48:05,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:48:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:48:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:48:05,469 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-23 19:48:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:06,294 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-23 19:48:06,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:48:06,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-23 19:48:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:06,296 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:48:06,296 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:48:06,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:48:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:48:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-23 19:48:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:48:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 19:48:06,332 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-23 19:48:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:06,332 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 19:48:06,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:48:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 19:48:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:48:06,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:06,333 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 19:48:06,334 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:06,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:06,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-09-23 19:48:06,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:06,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:06,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:06,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:06,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:08,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:08,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:08,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:08,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:48:08,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:08,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:11,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:11,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-09-23 19:48:11,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-23 19:48:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-23 19:48:11,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=17029, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:48:11,941 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-09-23 19:48:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:15,855 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-23 19:48:15,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:48:15,855 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-23 19:48:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:15,856 INFO L225 Difference]: With dead ends: 224 [2018-09-23 19:48:15,856 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:48:15,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11936 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6247, Invalid=26695, Unknown=0, NotChecked=0, Total=32942 [2018-09-23 19:48:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:48:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:48:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:48:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-23 19:48:15,889 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-23 19:48:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:15,889 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-23 19:48:15,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-23 19:48:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-23 19:48:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:48:15,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:15,890 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-23 19:48:15,891 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:15,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-09-23 19:48:15,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:15,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:15,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:15,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:16,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:16,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:16,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:16,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:16,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:16,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:16,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-23 19:48:16,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:48:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:48:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:48:16,795 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-23 19:48:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:17,658 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-23 19:48:17,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:48:17,659 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-23 19:48:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:17,660 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:48:17,660 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:48:17,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:48:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:48:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-23 19:48:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:48:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-23 19:48:17,692 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-23 19:48:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:17,692 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-23 19:48:17,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:48:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-23 19:48:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:48:17,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:17,693 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-23 19:48:17,693 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:17,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-09-23 19:48:17,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:17,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:19,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:19,863 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 [2018-09-23 19:48:19,870 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:20,002 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:48:20,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:20,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:23,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:23,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-09-23 19:48:23,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-23 19:48:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-23 19:48:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=17983, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:48:23,767 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-09-23 19:48:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:27,927 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-23 19:48:27,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:48:27,928 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-23 19:48:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:27,929 INFO L225 Difference]: With dead ends: 230 [2018-09-23 19:48:27,929 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:48:27,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12619 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6587, Invalid=28195, Unknown=0, NotChecked=0, Total=34782 [2018-09-23 19:48:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:48:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 19:48:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:48:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-23 19:48:27,967 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-23 19:48:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:27,968 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-23 19:48:27,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-23 19:48:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-23 19:48:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:48:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:27,969 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-23 19:48:27,969 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:27,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-09-23 19:48:27,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:27,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:27,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:28,697 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 [2018-09-23 19:48:28,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:28,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 19:48:28,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:28,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:28,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:28,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-23 19:48:28,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:48:28,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:48:28,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:48:28,923 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-23 19:48:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:30,040 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-23 19:48:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:48:30,041 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-23 19:48:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:30,042 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:48:30,042 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:48:30,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:48:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:48:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-23 19:48:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:48:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 19:48:30,074 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-23 19:48:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:30,074 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 19:48:30,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:48:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 19:48:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:48:30,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:30,075 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 19:48:30,075 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:30,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-09-23 19:48:30,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:30,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:30,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:30,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:32,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:32,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:32,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:32,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:36,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:36,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-09-23 19:48:36,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-23 19:48:36,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-23 19:48:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4599, Invalid=18963, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:48:36,417 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-09-23 19:48:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:41,301 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-23 19:48:41,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:48:41,301 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-23 19:48:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:41,302 INFO L225 Difference]: With dead ends: 236 [2018-09-23 19:48:41,302 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:48:41,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13321 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6936, Invalid=29736, Unknown=0, NotChecked=0, Total=36672 [2018-09-23 19:48:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:48:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:48:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:48:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-23 19:48:41,333 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-23 19:48:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:41,333 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-23 19:48:41,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-23 19:48:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-23 19:48:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:48:41,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:41,334 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-23 19:48:41,334 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:41,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-09-23 19:48:41,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:41,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:41,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:41,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:42,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:42,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:42,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:42,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:42,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:42,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:42,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-23 19:48:42,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:48:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:48:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:48:42,232 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-23 19:48:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:43,144 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-23 19:48:43,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:48:43,144 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-23 19:48:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:43,146 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:48:43,146 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:48:43,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:48:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:48:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 19:48:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:48:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-23 19:48:43,182 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-23 19:48:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:43,182 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-23 19:48:43,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:48:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-23 19:48:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:48:43,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:43,183 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-23 19:48:43,183 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:43,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-09-23 19:48:43,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:43,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:43,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:43,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:43,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:45,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:45,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:45,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:48:45,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:45,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:50,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-09-23 19:48:50,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-23 19:48:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-23 19:48:50,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4837, Invalid=19969, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:48:50,130 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-09-23 19:48:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:54,237 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-23 19:48:54,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:48:54,237 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-23 19:48:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:54,237 INFO L225 Difference]: With dead ends: 242 [2018-09-23 19:48:54,238 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:48:54,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7294, Invalid=31318, Unknown=0, NotChecked=0, Total=38612 [2018-09-23 19:48:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:48:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 19:48:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:48:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-23 19:48:54,281 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-23 19:48:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:54,281 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-23 19:48:54,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-23 19:48:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-23 19:48:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:48:54,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:54,282 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-23 19:48:54,282 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:54,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-09-23 19:48:54,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:54,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:54,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:54,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:55,399 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 [2018-09-23 19:48:55,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:55,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:55,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:55,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:55,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-23 19:48:55,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:48:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:48:55,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:48:55,607 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-23 19:48:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:56,583 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-23 19:48:56,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:48:56,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-23 19:48:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:56,585 INFO L225 Difference]: With dead ends: 169 [2018-09-23 19:48:56,585 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:48:56,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:48:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:48:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-23 19:48:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:48:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 19:48:56,624 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-23 19:48:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:56,624 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 19:48:56,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:48:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 19:48:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:48:56,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:56,625 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 19:48:56,625 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:56,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-09-23 19:48:56,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:56,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:58,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:58,890 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:59,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:48:59,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:59,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:03,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:03,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-09-23 19:49:03,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-23 19:49:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-23 19:49:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5081, Invalid=21001, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:49:03,677 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-09-23 19:49:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:06,173 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-23 19:49:06,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:49:06,173 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-23 19:49:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:06,174 INFO L225 Difference]: With dead ends: 248 [2018-09-23 19:49:06,174 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:49:06,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14782 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=7661, Invalid=32941, Unknown=0, NotChecked=0, Total=40602 [2018-09-23 19:49:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:49:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:49:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:49:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-23 19:49:06,213 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-23 19:49:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:06,213 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-23 19:49:06,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-23 19:49:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-23 19:49:06,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:49:06,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:06,214 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-23 19:49:06,214 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:06,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-09-23 19:49:06,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:06,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:06,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:06,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:06,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:07,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:07,006 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 [2018-09-23 19:49:07,013 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:07,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-23 19:49:07,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:07,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:07,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:07,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-23 19:49:07,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:49:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:49:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:49:07,331 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-23 19:49:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:08,339 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-23 19:49:08,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:49:08,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-23 19:49:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:08,340 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:49:08,341 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:49:08,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:49:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:49:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-23 19:49:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:49:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-23 19:49:08,378 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-23 19:49:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:08,379 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-23 19:49:08,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:49:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-23 19:49:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:49:08,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:08,379 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-23 19:49:08,380 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:08,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-09-23 19:49:08,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:08,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:08,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:08,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:08,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:11,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:11,041 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 [2018-09-23 19:49:11,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:11,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 19:49:13,114 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 19:49:13,314 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:13,315 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:49:13,320 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:49:13,320 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:49:13 BoogieIcfgContainer [2018-09-23 19:49:13,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:49:13,321 INFO L168 Benchmark]: Toolchain (without parser) took 239862.90 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 88.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 59.2 MB). Peak memory consumption was 147.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:13,321 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2018-09-23 19:49:13,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.23 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. [2018-09-23 19:49:13,322 INFO L168 Benchmark]: Boogie Preprocessor took 20.98 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. [2018-09-23 19:49:13,322 INFO L168 Benchmark]: RCFGBuilder took 406.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:13,323 INFO L168 Benchmark]: TraceAbstraction took 239390.16 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 88.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 38.1 MB). Peak memory consumption was 126.2 MB. Max. memory is 7.1 GB. [2018-09-23 19:49:13,325 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 0.22 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 40.23 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 20.98 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 406.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239390.16 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 88.1 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 38.1 MB). Peak memory consumption was 126.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was analyzing trace of length 167 with TraceHistMax 41, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 130 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 239.3s OverallTime, 81 OverallIterations, 41 TraceHistogramMax, 90.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1182 SDtfs, 905 SDslu, 6388 SDs, 0 SdLazy, 63860 SolverSat, 3987 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11827 GetRequests, 5891 SyntacticMatches, 0 SemanticMatches, 5936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226475 ImplicationChecksByTransitivity, 165.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred 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: 1.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 160 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 132.9s InterpolantComputationTime, 13586 NumberOfCodeBlocks, 13586 NumberOfCodeBlocksAsserted, 1003 NumberOfCheckSat, 13428 ConstructedInterpolants, 0 QuantifiedInterpolants, 7396594 SizeOfPredicates, 312 NumberOfNonLiveVariables, 27456 ConjunctsInSsa, 3666 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 88558/173838 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/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-49-13-334.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-49-13-334.csv Completed graceful shutdown