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/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:21:05,304 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:21:05,306 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:21:05,321 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:21:05,322 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:21:05,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:21:05,324 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:21:05,326 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:21:05,328 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:21:05,328 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:21:05,329 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:21:05,371 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:21:05,398 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:21:05,398 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:21:05,399 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:21:05,399 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:21:05,400 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:21:05,400 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:21:05,400 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:21:05,400 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:21:05,400 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:21:05,401 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:21:05,402 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:21:05,402 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:21:05,402 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:21:05,402 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:21:05,402 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:21:05,403 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:21:05,403 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:21:05,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:21:05,403 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:21:05,403 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:21:05,404 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:21:05,404 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:21:05,404 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:21:05,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:21:05,404 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:21:05,449 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:21:05,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:21:05,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:21:05,466 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:21:05,467 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:21:05,468 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-09-30 23:21:05,468 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-09-30 23:21:05,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:21:05,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:21:05,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:21:05,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:21:05,518 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:21:05,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:21:05,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:21:05,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:21:05,559 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:21:05,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... [2018-09-30 23:21:05,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:21:05,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:21:05,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:21:05,578 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:21:05,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:21:05,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:21:05,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:21:05,883 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:21:05,883 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:21:05 BoogieIcfgContainer [2018-09-30 23:21:05,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:21:05,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:21:05,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:21:05,888 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:21:05,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:21:05" (1/2) ... [2018-09-30 23:21:05,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74260bc1 and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:21:05, skipping insertion in model container [2018-09-30 23:21:05,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:21:05" (2/2) ... [2018-09-30 23:21:05,892 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-09-30 23:21:05,902 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:21:05,910 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:21:05,974 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:21:05,975 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:21:05,975 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:21:05,975 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:21:05,977 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:21:05,978 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:21:05,978 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:21:05,978 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:21:05,978 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:21:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:21:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:21:06,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:06,012 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:21:06,013 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:06,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:21:06,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:06,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:06,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:06,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,186 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:21:06,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:21:06,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:21:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:21:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:21:06,204 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:21:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:06,251 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:21:06,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:21:06,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:21:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:06,264 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:21:06,265 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:21:06,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:21:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:21:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:21:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:21:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:21:06,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:21:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:06,312 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:21:06,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:21:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:21:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:21:06,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:06,313 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:21:06,313 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:06,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:21:06,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:06,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:06,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:06,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:06,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:06,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:21:06,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:21:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:21:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:21:06,547 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 23:21:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:06,624 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:21:06,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:21:06,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:21:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:06,626 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:21:06,626 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:21:06,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:21:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:21:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:21:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:21:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:21:06,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:21:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:06,631 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:21:06,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:21:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:21:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:21:06,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:06,633 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:21:06,633 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:06,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 23:21:06,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:06,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:06,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:06,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,749 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 [2018-09-30 23:21:06,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:06,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:06,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:06,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:06,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:21:06,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:21:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:21:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:21:06,818 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 23:21:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:06,884 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:21:06,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:21:06,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:21:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:06,885 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:21:06,885 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:21:06,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:21:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:21:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:21:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:21:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:21:06,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:21:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:06,890 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:21:06,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:21:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:21:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:21:06,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:06,891 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:21:06,891 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:06,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 23:21:06,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:06,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:06,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:07,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:07,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:07,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:21:07,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:07,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:21:07,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:21:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:21:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:21:07,073 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 23:21:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,125 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:21:07,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:21:07,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:21:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,127 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:21:07,127 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:21:07,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:21:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:21:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:21:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:21:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:21:07,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:21:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,137 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:21:07,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:21:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:21:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:21:07,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,139 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:21:07,139 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 23:21:07,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:07,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:07,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:07,455 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:07,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:07,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:21:07,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:21:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:21:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:21:07,491 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 23:21:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,571 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:21:07,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:21:07,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 23:21:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,573 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:21:07,573 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:21:07,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:21:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:21:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:21:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:21:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:21:07,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:21:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,579 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:21:07,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:21:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:21:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:21:07,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,580 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:21:07,581 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,581 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 23:21:07,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:07,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:07,760 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:07,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:21:07,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:07,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:21:07,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:21:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:21:07,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:21:07,842 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 23:21:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,877 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:21:07,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:21:07,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:21:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,878 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:21:07,879 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:21:07,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:21:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:21:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:21:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:21:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:21:07,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:21:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,885 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:21:07,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:21:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:21:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:21:07,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,886 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:21:07,886 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 23:21:07,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:08,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:08,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:08,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:08,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:21:08,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:08,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:08,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:08,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:21:08,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:21:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:21:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:21:08,174 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 23:21:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:08,221 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:21:08,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:21:08,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:21:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:08,223 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:21:08,224 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:21:08,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:21:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:21:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:21:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:21:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:21:08,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:21:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:08,229 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:21:08,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:21:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:21:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:21:08,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:08,230 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:21:08,230 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:08,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 23:21:08,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:08,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:08,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:08,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:08,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:08,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:08,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:08,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:08,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:08,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:08,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:21:08,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:21:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:21:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:21:08,633 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 23:21:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:08,788 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:21:08,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:21:08,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:21:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:08,789 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:21:08,789 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:21:08,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:21:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:21:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:21:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:21:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:21:08,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:21:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:08,795 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:21:08,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:21:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:21:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:21:08,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:08,796 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:21:08,796 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:08,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:08,797 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 23:21:08,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:08,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:08,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:08,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:08,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:08,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:08,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:08,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:08,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:08,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:08,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:09,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:09,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:21:09,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:21:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:21:09,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:21:09,029 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 23:21:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:09,081 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:21:09,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:21:09,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 23:21:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:09,082 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:21:09,082 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:21:09,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:21:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:21:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:21:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:21:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:21:09,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:21:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:09,089 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:21:09,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:21:09,092 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:21:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:21:09,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:09,093 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:21:09,093 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:09,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 23:21:09,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:09,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:09,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:09,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:09,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:09,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:21:09,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:09,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:09,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:09,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:21:09,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:21:09,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:21:09,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:21:09,459 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 23:21:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:09,495 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:21:09,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:21:09,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:21:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:09,496 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:21:09,496 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:21:09,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:21:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:21:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:21:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:21:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:21:09,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:21:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:09,503 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:21:09,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:21:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:21:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:21:09,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:09,504 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:21:09,504 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:09,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 23:21:09,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:09,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:09,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:09,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:09,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:09,785 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:09,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:09,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:09,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:09,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:21:09,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:21:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:21:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:21:09,828 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 23:21:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:09,897 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:21:09,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:21:09,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 23:21:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:09,898 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:21:09,899 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:21:09,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:21:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:21:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:21:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:21:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:21:09,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:21:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:09,905 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:21:09,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:21:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:21:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:21:09,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:09,906 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:21:09,906 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:09,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 23:21:09,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:09,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:09,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:09,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:10,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:10,114 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:10,145 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:21:10,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:10,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:10,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:21:10,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:21:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:21:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:21:10,190 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 23:21:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:10,414 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:21:10,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:21:10,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:21:10,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:10,418 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:21:10,418 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:21:10,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:21:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:21:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:21:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:21:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:21:10,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:21:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:10,429 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:21:10,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:21:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:21:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:21:10,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:10,430 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:21:10,431 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:10,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:10,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 23:21:10,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:10,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:10,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:10,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:10,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:10,697 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:21:10,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:10,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:10,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:21:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:21:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:21:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:21:10,742 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 23:21:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:10,800 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:21:10,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:21:10,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 23:21:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:10,801 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:21:10,801 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:21:10,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:21:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:21:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:21:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:21:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:21:10,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:21:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:10,807 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:21:10,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:21:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:21:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:21:10,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:10,808 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:21:10,809 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:10,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 23:21:10,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:10,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:10,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:10,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:11,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:11,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:11,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:21:11,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:21:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:21:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:21:11,158 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 23:21:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:11,197 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:21:11,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:21:11,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:21:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:11,202 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:21:11,202 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:21:11,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:21:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:21:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:21:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:21:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:21:11,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:21:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:11,208 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:21:11,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:21:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:21:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:21:11,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:11,209 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:21:11,209 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:11,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 23:21:11,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:11,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:11,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:11,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:11,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:11,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:11,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:11,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:11,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:11,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:21:11,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:21:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:21:11,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:21:11,528 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 23:21:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:11,574 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:21:11,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:21:11,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:21:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:11,576 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:21:11,576 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:21:11,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:21:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:21:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:21:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:21:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:21:11,582 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:21:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:11,582 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:21:11,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:21:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:21:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:21:11,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:11,583 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:21:11,583 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:11,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 23:21:11,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:11,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:11,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:11,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:11,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:11,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:12,001 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:21:12,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:12,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:12,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:12,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:21:12,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:21:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:21:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:21:12,048 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 23:21:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:12,130 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:21:12,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:21:12,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:21:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:12,131 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:21:12,131 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:21:12,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:21:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:21:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:21:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:21:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:21:12,137 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:21:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:12,138 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:21:12,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:21:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:21:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:21:12,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:12,139 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:21:12,139 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:12,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 23:21:12,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:12,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:12,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:12,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:12,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:12,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:12,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:12,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:12,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:12,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:12,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:21:12,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:21:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:21:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:21:12,595 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 23:21:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:12,643 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:21:12,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:21:12,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 23:21:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:12,649 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:21:12,650 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:21:12,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:21:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:21:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:21:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:21:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:21:12,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:21:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:12,656 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:21:12,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:21:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:21:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:21:12,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:12,657 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:21:12,657 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:12,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 23:21:12,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:12,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:12,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:12,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:13,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:13,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:13,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:21:13,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:13,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:13,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:21:13,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:21:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:21:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:21:13,223 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 23:21:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:13,424 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:21:13,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:21:13,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:21:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:13,425 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:21:13,425 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:21:13,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:21:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:21:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:21:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:21:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:21:13,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:21:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:13,430 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:21:13,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:21:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:21:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:21:13,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:13,431 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:21:13,432 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:13,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 23:21:13,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:13,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:13,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:13,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:13,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:13,776 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:13,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:21:13,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:13,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:13,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:21:13,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:21:13,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:21:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:21:13,868 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 23:21:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:13,929 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:21:13,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:21:13,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:21:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:13,931 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:21:13,931 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:21:13,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:21:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:21:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:21:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:21:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:21:13,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:21:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:13,937 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:21:13,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:21:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:21:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:21:13,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:13,938 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:21:13,938 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:13,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 23:21:13,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:13,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:13,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:13,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:14,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:14,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:14,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:14,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:14,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:14,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:21:14,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:21:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:21:14,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:21:14,404 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 23:21:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:14,479 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:21:14,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:21:14,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:21:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:14,481 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:21:14,481 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:21:14,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:21:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:21:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:21:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:21:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:21:14,488 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:21:14,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:14,488 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:21:14,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:21:14,488 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:21:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:21:14,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:14,489 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:21:14,489 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:14,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 23:21:14,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:14,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:14,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:14,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:14,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:14,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:14,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:14,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:14,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:14,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:15,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:15,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:21:15,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:21:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:21:15,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:21:15,019 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 23:21:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:15,083 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:21:15,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:21:15,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 23:21:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:15,084 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:21:15,084 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:21:15,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:21:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:21:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:21:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:21:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:21:15,089 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:21:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:15,090 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:21:15,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:21:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:21:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:21:15,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:15,091 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:21:15,091 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:15,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 23:21:15,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:15,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:15,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:15,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:15,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:15,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:15,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:16,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:21:16,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:16,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:16,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:21:16,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:21:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:21:16,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:21:16,124 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 23:21:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:16,383 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:21:16,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:21:16,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:21:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:16,386 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:21:16,386 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:21:16,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:21:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:21:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:21:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:21:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:21:16,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:21:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:16,392 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:21:16,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:21:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:21:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:21:16,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:16,393 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:21:16,393 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:16,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 23:21:16,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:16,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:16,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:16,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:16,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:16,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:16,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:16,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:16,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:16,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:21:16,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:21:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:21:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:21:16,878 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 23:21:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:16,952 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:21:16,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:21:16,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 23:21:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:16,954 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:21:16,954 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:21:16,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:21:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:21:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:21:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:21:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:21:16,969 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:21:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:16,969 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:21:16,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:21:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:21:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:21:16,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:16,974 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:21:16,974 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:16,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:16,974 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 23:21:16,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:16,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:16,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:17,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:17,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:17,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:21:17,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:17,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:17,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:21:17,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:21:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:21:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:21:17,875 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 23:21:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:17,966 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:21:17,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:21:17,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:21:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:17,967 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:21:17,967 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:21:17,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:21:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:21:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:21:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:21:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:21:17,971 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:21:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:17,971 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:21:17,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:21:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:21:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:21:17,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:17,972 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 23:21:17,972 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:17,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:17,972 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 23:21:17,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:17,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:18,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:18,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:18,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:18,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:21:18,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:18,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:18,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:18,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:21:18,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:21:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:21:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:21:18,999 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 23:21:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:19,057 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:21:19,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:21:19,057 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 23:21:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:19,058 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:21:19,058 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:21:19,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:21:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:21:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:21:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:21:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:21:19,063 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 23:21:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:19,063 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:21:19,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:21:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:21:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:21:19,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:19,064 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 23:21:19,064 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:19,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 23:21:19,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:19,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:19,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:19,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:19,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:19,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:19,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:19,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:21:19,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:21:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:21:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:21:19,702 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 23:21:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:19,746 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:21:19,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:21:19,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 23:21:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:19,747 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:21:19,748 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:21:19,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:21:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:21:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:21:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:21:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:21:19,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 23:21:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:19,753 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:21:19,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:21:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:21:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:21:19,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:19,754 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 23:21:19,754 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:19,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 23:21:19,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:19,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:19,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:20,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:20,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:20,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:20,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:20,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:20,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:20,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:20,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:21:20,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:21:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:21:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:21:20,689 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 23:21:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:20,741 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:21:20,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:21:20,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 23:21:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:20,743 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:21:20,743 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:21:20,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:21:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:21:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:21:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:21:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:21:20,747 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 23:21:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:20,747 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:21:20,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:21:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:21:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:21:20,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:20,748 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 23:21:20,749 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:20,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 23:21:20,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:20,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:20,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:20,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:21,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:21,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:21,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:21,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:21:21,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:21,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:21,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:21,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:21:21,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:21:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:21:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:21:21,309 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 23:21:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:21,354 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:21:21,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:21:21,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 23:21:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:21,356 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:21:21,356 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:21:21,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:21:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:21:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:21:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:21:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:21:21,362 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 23:21:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:21,362 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:21:21,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:21:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:21:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:21:21,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:21,363 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 23:21:21,363 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:21,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 23:21:21,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:21,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:21,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:21,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:21,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:21,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:21,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:21,962 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:21,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:21,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:22,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:22,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:21:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:21:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:21:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:21:22,006 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 23:21:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,077 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:21:22,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:21:22,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 23:21:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,078 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:21:22,078 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:21:22,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:21:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:21:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:21:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:21:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:21:22,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 23:21:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:22,082 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:21:22,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:21:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:21:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:21:22,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:22,083 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 23:21:22,083 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:22,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 23:21:22,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:22,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:22,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:22,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:22,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:22,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:22,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:22,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:21:22,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:22,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:22,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:22,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:21:22,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:21:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:21:22,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:21:22,918 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 23:21:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,995 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:21:22,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:21:22,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 23:21:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,996 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:21:22,996 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:21:22,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:21:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:21:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:21:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:21:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:21:23,000 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 23:21:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:23,001 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:21:23,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:21:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:21:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:21:23,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:23,001 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 23:21:23,002 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:23,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 23:21:23,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:23,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:23,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:23,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:23,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:23,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:23,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:23,970 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:21:23,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:23,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:24,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:24,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:21:24,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:21:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:21:24,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:21:24,009 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 23:21:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:24,209 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:21:24,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:21:24,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 23:21:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:24,211 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:21:24,211 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:21:24,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:21:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:21:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:21:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:21:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:21:24,215 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 23:21:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:24,216 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:21:24,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:21:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:21:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:21:24,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:24,216 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 23:21:24,217 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:24,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 23:21:24,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:24,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:24,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:24,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:24,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:24,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:24,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:24,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:24,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:24,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:21:24,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:21:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:21:24,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:21:24,733 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 23:21:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:24,788 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:21:24,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:21:24,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 23:21:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:24,790 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:21:24,790 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:21:24,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:21:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:21:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:21:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:21:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:21:24,794 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 23:21:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:24,794 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:21:24,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:21:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:21:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:21:24,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:24,795 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 23:21:24,795 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:24,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 23:21:24,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:24,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:24,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:25,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:25,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:25,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:25,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:25,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:25,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:25,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:25,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:21:25,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:21:25,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:21:25,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:21:25,358 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 23:21:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:25,414 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:21:25,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:21:25,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 23:21:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:25,416 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:21:25,416 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:21:25,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:21:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:21:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:21:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:21:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:21:25,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 23:21:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:25,420 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:21:25,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:21:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:21:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:21:25,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:25,421 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 23:21:25,421 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:25,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 23:21:25,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:25,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:26,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:26,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:26,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:26,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:21:26,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:26,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:26,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:26,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:21:26,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:21:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:21:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:21:26,220 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 23:21:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:26,301 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:21:26,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:21:26,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 23:21:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:26,303 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:21:26,303 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:21:26,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:21:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:21:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:21:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:21:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:21:26,307 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 23:21:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:26,307 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:21:26,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:21:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:21:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:21:26,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:26,308 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 23:21:26,308 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:26,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 23:21:26,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:26,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:26,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:26,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:27,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:27,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:27,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:27,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:27,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:27,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:27,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:27,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:21:27,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:21:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:21:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:21:27,201 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 23:21:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:27,371 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:21:27,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:21:27,371 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 23:21:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:27,372 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:21:27,373 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:21:27,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:21:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:21:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:21:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:21:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:21:27,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 23:21:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:21:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:21:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:21:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:21:27,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:27,379 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 23:21:27,379 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:27,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 23:21:27,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:27,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:27,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:27,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:27,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:28,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:28,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:28,153 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:28,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:21:28,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:28,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:28,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:28,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:21:28,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:21:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:21:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:21:28,491 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 23:21:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,555 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:21:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:21:28,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 23:21:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,557 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:21:28,557 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:21:28,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:21:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:21:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:21:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:21:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:21:28,561 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 23:21:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,561 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:21:28,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:21:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:21:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:21:28,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,562 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 23:21:28,562 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 23:21:28,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:29,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:29,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:29,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:29,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:21:29,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:29,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:29,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:29,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:21:29,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:21:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:21:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:29,523 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 23:21:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:29,587 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:21:29,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:21:29,588 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 23:21:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:29,589 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:21:29,589 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:21:29,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:21:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:21:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:21:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:21:29,593 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 23:21:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:29,593 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:21:29,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:21:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:21:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:21:29,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:29,594 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 23:21:29,594 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:29,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 23:21:29,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:29,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:29,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:29,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:29,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:30,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:30,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:30,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:30,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:30,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:30,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:21:30,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:21:30,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:21:30,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:30,323 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 23:21:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:30,403 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:21:30,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:21:30,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 23:21:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:30,405 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:21:30,405 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:21:30,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:21:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:21:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:21:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:21:30,409 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 23:21:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:30,409 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:21:30,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:21:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:21:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:21:30,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:30,410 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 23:21:30,410 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:30,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 23:21:30,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:30,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:31,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:31,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:31,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:31,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:31,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:31,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:31,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:31,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:21:31,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:21:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:21:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:31,170 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 23:21:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:31,255 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:21:31,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:21:31,255 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 23:21:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:31,256 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:21:31,256 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:21:31,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:21:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:21:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:21:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:21:31,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 23:21:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:31,259 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:21:31,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:21:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:21:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:21:31,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:31,260 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 23:21:31,260 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:31,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 23:21:31,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:31,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:31,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:31,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:31,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:32,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:32,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:32,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:32,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:21:32,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:32,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:32,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:32,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:21:32,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:21:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:21:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:32,278 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 23:21:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:32,417 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:21:32,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:21:32,417 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 23:21:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:32,418 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:21:32,418 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:21:32,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:21:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:21:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:21:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:21:32,422 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 23:21:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:32,422 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:21:32,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:21:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:21:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:21:32,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:32,423 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 23:21:32,423 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:32,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 23:21:32,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:32,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:33,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:33,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:33,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:33,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:33,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:33,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:33,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:33,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:21:33,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:21:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:21:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:33,361 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 23:21:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:33,463 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:21:33,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:21:33,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 23:21:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:33,464 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:21:33,464 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:21:33,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:21:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:21:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:21:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:21:33,470 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 23:21:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:33,470 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:21:33,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:21:33,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:21:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:21:33,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:33,471 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 23:21:33,471 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:33,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:33,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 23:21:33,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:33,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:33,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:33,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:34,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:34,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:34,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:35,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:21:35,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:35,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:35,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:35,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:21:35,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:21:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:21:35,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:35,312 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 23:21:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:35,398 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:21:35,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:21:35,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 23:21:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:35,400 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:21:35,400 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:21:35,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:21:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:21:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:21:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:21:35,403 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 23:21:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:35,403 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:21:35,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:21:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:21:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:21:35,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:35,405 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 23:21:35,405 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:35,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:35,405 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 23:21:35,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:35,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:35,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:35,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:36,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:36,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:36,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:36,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:21:36,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:36,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:36,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:36,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:21:36,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:21:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:21:36,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:36,502 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 23:21:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:36,560 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:21:36,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:21:36,560 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 23:21:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:36,561 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:21:36,562 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:21:36,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:21:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:21:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:21:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:21:36,565 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 23:21:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:36,565 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:21:36,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:21:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:21:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:21:36,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:36,566 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 23:21:36,566 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:36,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 23:21:36,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:36,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:36,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:36,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:36,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:37,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:37,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:37,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:37,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:38,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:38,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:21:38,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:21:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:21:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:38,003 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 23:21:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:38,984 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:21:38,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:21:38,984 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 23:21:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:38,985 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:21:38,985 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:21:38,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:21:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:21:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:21:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:21:38,988 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 23:21:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:38,988 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:21:38,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:21:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:21:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:21:38,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:38,988 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 23:21:38,989 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:38,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 23:21:38,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:38,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:38,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:38,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:38,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:40,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:40,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:40,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:40,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:40,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:40,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:40,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:40,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:21:40,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:21:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:21:40,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:40,521 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 23:21:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:40,881 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:21:40,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:21:40,881 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 23:21:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:40,882 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:21:40,882 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:21:40,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:21:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:21:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:21:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:21:40,887 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 23:21:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:40,888 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:21:40,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:21:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:21:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:21:40,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:40,888 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 23:21:40,889 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:40,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 23:21:40,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:40,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:40,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:40,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:40,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:41,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:41,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:41,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:42,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:21:42,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:42,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:42,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:42,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:21:42,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:21:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:21:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:21:42,289 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 23:21:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:42,363 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:21:42,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:21:42,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 23:21:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:42,364 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:21:42,364 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:21:42,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:21:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:21:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:21:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:21:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:21:42,368 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 23:21:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:42,368 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:21:42,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:21:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:21:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:21:42,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:42,369 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 23:21:42,369 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:42,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 23:21:42,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:42,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:42,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:42,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:42,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:43,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:43,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:43,404 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:43,437 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:43,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:43,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:43,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:43,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:21:43,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:21:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:21:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:21:43,483 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 23:21:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:43,568 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:21:43,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:21:43,568 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 23:21:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:43,569 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:21:43,569 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:21:43,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:21:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:21:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:21:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:21:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:21:43,572 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 23:21:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:43,573 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:21:43,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:21:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:21:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:21:43,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:43,574 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 23:21:43,574 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:43,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 23:21:43,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:43,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:43,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:43,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:44,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:44,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:44,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:45,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:21:45,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:45,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:45,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:45,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:21:45,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:21:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:21:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:21:45,828 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 23:21:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:45,925 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:21:45,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:21:45,926 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 23:21:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:45,927 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:21:45,927 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:21:45,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:21:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:21:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:21:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:21:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:21:45,931 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 23:21:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:21:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:21:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:21:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:21:45,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:45,932 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 23:21:45,932 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:45,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 23:21:45,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:45,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:45,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:45,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:45,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:47,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:47,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:47,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:47,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:21:47,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:47,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:47,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:47,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:21:47,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:21:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:21:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:21:47,693 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 23:21:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:47,801 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:21:47,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:21:47,801 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 23:21:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:47,802 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:21:47,802 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:21:47,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:21:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:21:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:21:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:21:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:21:47,807 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 23:21:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:47,808 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:21:47,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:21:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:21:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:21:47,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:47,809 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 23:21:47,809 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:47,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 23:21:47,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:47,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:47,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:47,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:48,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:48,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:48,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:48,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:48,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:48,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:21:48,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:21:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:21:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:21:48,994 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 23:21:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:49,101 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:21:49,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:21:49,101 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 23:21:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:49,102 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:21:49,102 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:21:49,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:21:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:21:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:21:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:21:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:21:49,106 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 23:21:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:49,106 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:21:49,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:21:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:21:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:21:49,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:49,107 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 23:21:49,107 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:49,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 23:21:49,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:49,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:50,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:50,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:50,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:50,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:50,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:50,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:50,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:50,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:21:50,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:21:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:21:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:21:50,814 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 23:21:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:51,013 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:21:51,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:21:51,014 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 23:21:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:51,015 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:21:51,016 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:21:51,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:21:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:21:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:21:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:21:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:21:51,020 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 23:21:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:51,020 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:21:51,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:21:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:21:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:21:51,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:51,021 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 23:21:51,021 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:51,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 23:21:51,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:51,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:51,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:51,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:51,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:52,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:52,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:52,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:52,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:21:52,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:52,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:52,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:52,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:21:52,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:21:52,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:21:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:21:52,597 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 23:21:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:52,947 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:21:52,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:21:52,947 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 23:21:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:52,948 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:21:52,949 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:21:52,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:21:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:21:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:21:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:21:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:21:52,953 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 23:21:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:52,953 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:21:52,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:21:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:21:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:21:52,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:52,954 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 23:21:52,955 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:52,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 23:21:52,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:52,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:52,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:55,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:55,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:55,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:55,459 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:55,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:55,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:55,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:55,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:21:55,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:21:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:21:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:21:55,509 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 23:21:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:55,618 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:21:55,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:21:55,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 23:21:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:55,620 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:21:55,620 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:21:55,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:21:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:21:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:21:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:21:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:21:55,623 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 23:21:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:55,624 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:21:55,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:21:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:21:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:21:55,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:55,625 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 23:21:55,625 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:55,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 23:21:55,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:55,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:55,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:55,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:56,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:56,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:56,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:58,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:21:58,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:58,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:58,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:58,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:21:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:21:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:21:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:21:58,233 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 23:21:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:58,376 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:21:58,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:21:58,377 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 23:21:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:58,378 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:21:58,378 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:21:58,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:21:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:21:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:21:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:21:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:21:58,382 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 23:21:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:58,383 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:21:58,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:21:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:21:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:21:58,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:58,384 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 23:21:58,384 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:58,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 23:21:58,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:58,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:58,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:58,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:58,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:00,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:00,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:00,557 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:00,947 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:22:00,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:00,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:01,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:01,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:22:01,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:22:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:22:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:22:01,011 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 23:22:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:01,811 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:22:01,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:22:01,811 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 23:22:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:01,812 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:22:01,812 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:22:01,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:22:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:22:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:22:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:22:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:22:01,816 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 23:22:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:01,816 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:22:01,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:22:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:22:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:22:01,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:01,817 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 23:22:01,817 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:01,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 23:22:01,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:01,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:01,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:01,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:01,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:03,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:03,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:03,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:03,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:22:03,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:22:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:22:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:22:03,189 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 23:22:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:03,564 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:22:03,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:22:03,564 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 23:22:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:03,566 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:22:03,566 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:22:03,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:22:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:22:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:22:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:22:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:22:03,570 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 23:22:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:03,570 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:22:03,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:22:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:22:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:22:03,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:03,571 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 23:22:03,571 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:03,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 23:22:03,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:03,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:03,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:05,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:05,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:05,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:05,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:05,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:05,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:05,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:05,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:22:05,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:22:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:22:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:22:05,341 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 23:22:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:05,475 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:22:05,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:22:05,476 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 23:22:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:05,477 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:22:05,477 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:22:05,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:22:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:22:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:22:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:22:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:22:05,481 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 23:22:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:05,481 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:22:05,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:22:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:22:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:22:05,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:05,482 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 23:22:05,482 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:05,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 23:22:05,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:05,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:05,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:05,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:06,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:06,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:06,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:07,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 23:22:07,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:07,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:07,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:07,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:22:07,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:22:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:22:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:22:07,506 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 23:22:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:08,933 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:22:08,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:22:08,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 23:22:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:08,935 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:22:08,935 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:22:08,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:22:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:22:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:22:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:22:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:22:08,939 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 23:22:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:08,940 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:22:08,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:22:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:22:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:22:08,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:08,941 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 23:22:08,941 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:08,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 23:22:08,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:08,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:10,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:10,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:10,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:10,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:10,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:10,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:10,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:10,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:22:10,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:22:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:22:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:22:10,977 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 23:22:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:11,112 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:22:11,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:22:11,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 23:22:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:11,114 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:22:11,114 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:22:11,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:22:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:22:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:22:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:22:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:22:11,117 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 23:22:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:22:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:22:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:22:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:22:11,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:11,118 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 23:22:11,118 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:11,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 23:22:11,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:11,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:12,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:12,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:12,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:14,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 23:22:14,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:14,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:14,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:14,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:22:14,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:22:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:22:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:22:14,501 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 23:22:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:14,753 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:22:14,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:22:14,753 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 23:22:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:14,754 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:22:14,754 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:22:14,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:22:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:22:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:22:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:22:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 23:22:14,757 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 23:22:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:14,758 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 23:22:14,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:22:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 23:22:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:22:14,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:14,759 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 23:22:14,759 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:14,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:14,759 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 23:22:14,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:14,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:14,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:14,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:16,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:16,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:16,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:16,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:22:16,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:16,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:16,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:16,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:22:16,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:22:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:22:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:22:16,914 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 23:22:17,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:17,014 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:22:17,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:22:17,014 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 23:22:17,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:17,016 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:22:17,016 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:22:17,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:22:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:22:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:22:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:22:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:22:17,019 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 23:22:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:17,019 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:22:17,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:22:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:22:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:22:17,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:17,020 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 23:22:17,020 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:17,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 23:22:17,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:17,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:17,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:18,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:18,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:18,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:18,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:18,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:18,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:22:18,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:22:18,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:22:18,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:22:18,612 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 23:22:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:18,766 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:22:18,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:22:18,766 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 23:22:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:18,767 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:22:18,767 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:22:18,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:22:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:22:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:22:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:22:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 23:22:18,771 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 23:22:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:18,771 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 23:22:18,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:22:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 23:22:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:22:18,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:18,772 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 23:22:18,772 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:18,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 23:22:18,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:18,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:18,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:18,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:18,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:20,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:20,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:20,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:20,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:20,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:20,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:22:20,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:22:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:22:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:22:20,703 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 23:22:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:20,801 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:22:20,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:22:20,801 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 23:22:20,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:20,803 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:22:20,803 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:22:20,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:22:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:22:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:22:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:22:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:22:20,806 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 23:22:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:20,807 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:22:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:22:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:22:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:22:20,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:20,807 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 23:22:20,808 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:20,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 23:22:20,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:20,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:20,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:20,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:20,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:22,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:22,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:22,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:23,115 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:22:23,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:23,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:23,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:23,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:22:23,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:22:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:22:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:22:23,165 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 23:22:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:23,322 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:22:23,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:22:23,323 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 23:22:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:23,324 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:22:23,324 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:22:23,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:22:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:22:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:22:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:22:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 23:22:23,328 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 23:22:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:23,329 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 23:22:23,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:22:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 23:22:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:22:23,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:23,330 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 23:22:23,330 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:23,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 23:22:23,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:23,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:23,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:23,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:23,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:24,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:24,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:24,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:24,963 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:24,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:24,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:25,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:25,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:22:25,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:22:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:22:25,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:22:25,035 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 23:22:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:25,392 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:22:25,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:22:25,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 23:22:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:25,394 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:22:25,394 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:22:25,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:22:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:22:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:22:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:22:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:22:25,399 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 23:22:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:25,400 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:22:25,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:22:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:22:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:22:25,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:25,401 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 23:22:25,401 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:25,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 23:22:25,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:25,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:25,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:25,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:27,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:27,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:27,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:29,858 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:22:29,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:29,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:29,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:29,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:22:29,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:22:29,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:22:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:22:29,927 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 23:22:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:30,286 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:22:30,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:22:30,286 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 23:22:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:30,287 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:22:30,287 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:22:30,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:22:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:22:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:22:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:22:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 23:22:30,290 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 23:22:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:30,291 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 23:22:30,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:22:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 23:22:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:22:30,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:30,292 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 23:22:30,292 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:30,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 23:22:30,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:30,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:30,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:30,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:32,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:32,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:32,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:32,795 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:22:32,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:32,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:32,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:32,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:22:32,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:22:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:22:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:22:32,865 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 23:22:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:33,742 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:22:33,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:22:33,742 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 23:22:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:33,743 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:22:33,743 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:22:33,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:22:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:22:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:22:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:22:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:22:33,747 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 23:22:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:33,747 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:22:33,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:22:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:22:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:22:33,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:33,748 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 23:22:33,748 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:33,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 23:22:33,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:33,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:33,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:35,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:35,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:35,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:35,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:35,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:35,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:22:35,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:22:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:22:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:22:35,807 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 23:22:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:35,919 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:22:35,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:22:35,919 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 23:22:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:35,920 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:22:35,920 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:22:35,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:22:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:22:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:22:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:22:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 23:22:35,925 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 23:22:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:35,925 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 23:22:35,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:22:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 23:22:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:22:35,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:35,926 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 23:22:35,926 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:35,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 23:22:35,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:35,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:35,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:35,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:35,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:37,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:37,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:37,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:37,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:37,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:37,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:37,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:37,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:22:37,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:22:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:22:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:22:37,779 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 23:22:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:37,894 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:22:37,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:22:37,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 23:22:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:37,896 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:22:37,896 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:22:37,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:22:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:22:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:22:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:22:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:22:37,900 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 23:22:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:37,901 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:22:37,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:22:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:22:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:22:37,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:37,901 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 23:22:37,902 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:37,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:37,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 23:22:37,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:37,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:37,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:37,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:37,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:39,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:39,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:39,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:40,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:22:40,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:40,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:40,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:40,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:22:40,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:22:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:22:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:22:40,789 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 23:22:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:41,085 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:22:41,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:22:41,085 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 23:22:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:41,086 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:22:41,086 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:22:41,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:22:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:22:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:22:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:22:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 23:22:41,090 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 23:22:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:41,091 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 23:22:41,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:22:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 23:22:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:22:41,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:41,091 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 23:22:41,092 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:41,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:41,092 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 23:22:41,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:41,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:41,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:41,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:41,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:42,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:42,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:42,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:42,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:42,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:42,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:43,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:43,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:22:43,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:22:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:22:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:22:43,056 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 23:22:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:43,268 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:22:43,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:22:43,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 23:22:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:43,270 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:22:43,270 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:22:43,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:22:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:22:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:22:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:22:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:22:43,274 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 23:22:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:43,274 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:22:43,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:22:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:22:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:22:43,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:43,275 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 23:22:43,275 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:43,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 23:22:43,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:43,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:43,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:43,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:43,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:45,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:45,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:45,204 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:48,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 23:22:48,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:48,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:49,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:49,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:22:49,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:22:49,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:22:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:22:49,031 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 23:22:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:49,192 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:22:49,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:22:49,193 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 23:22:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:49,194 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:22:49,194 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:22:49,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:22:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:22:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:22:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:22:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 23:22:49,201 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 23:22:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:49,202 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 23:22:49,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:22:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 23:22:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:22:49,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:49,203 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 23:22:49,203 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:49,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:49,203 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 23:22:49,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:49,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:49,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:51,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:51,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:51,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:52,380 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:22:52,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:52,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:52,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:52,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:22:52,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:22:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:22:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:22:52,440 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 23:22:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:52,582 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:22:52,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:22:52,582 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 23:22:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:52,584 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:22:52,584 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:22:52,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:22:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:22:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:22:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:22:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:22:52,588 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 23:22:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:52,589 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:22:52,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:22:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:22:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:22:52,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:52,590 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 23:22:52,590 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:52,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 23:22:52,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:52,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:54,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:54,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:54,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:54,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:54,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:54,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:22:54,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:22:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:22:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:22:54,788 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 23:22:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:54,977 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:22:54,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:22:54,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 23:22:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:54,978 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:22:54,978 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:22:54,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:22:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:22:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:22:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:22:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 23:22:54,981 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 23:22:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:54,982 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 23:22:54,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:22:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 23:22:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:22:54,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:54,983 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 23:22:54,983 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:54,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 23:22:54,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:54,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:54,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:54,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:57,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:57,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:57,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:57,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:57,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:57,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:57,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:57,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:22:57,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:22:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:22:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:22:57,513 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 23:22:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:57,719 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:22:57,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:22:57,719 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 23:22:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:57,720 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:22:57,720 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:22:57,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:22:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:22:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:22:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:22:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:22:57,724 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 23:22:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:57,724 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:22:57,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:22:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:22:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:22:57,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:57,725 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 23:22:57,726 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:57,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:57,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 23:22:57,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:57,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:57,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:57,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:59,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:59,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:59,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:01,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:23:01,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:01,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:01,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:01,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:23:01,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:23:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:23:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:23:01,237 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 23:23:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:01,444 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:23:01,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:23:01,444 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 23:23:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:01,445 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:23:01,445 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:23:01,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:23:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:23:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:23:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:23:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 23:23:01,448 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 23:23:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:01,448 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 23:23:01,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:23:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 23:23:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:23:01,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:01,449 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 23:23:01,449 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:01,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 23:23:01,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:01,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:01,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:01,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:01,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:03,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:03,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:03,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:03,667 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:03,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:03,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:03,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:03,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:23:03,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:23:03,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:23:03,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:23:03,719 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 23:23:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:03,917 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:23:03,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:23:03,917 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 23:23:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:03,918 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:23:03,918 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:23:03,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:23:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:23:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:23:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:23:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:23:03,921 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 23:23:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:03,922 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:23:03,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:23:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:23:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:23:03,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:03,922 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 23:23:03,923 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:03,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 23:23:03,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:03,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:03,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:03,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:03,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:06,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:06,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:06,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:12,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:23:12,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:12,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:12,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:12,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:23:12,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:23:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:23:12,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:23:12,185 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 23:23:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:12,675 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:23:12,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:23:12,675 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 23:23:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:12,676 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:23:12,677 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:23:12,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:23:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:23:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:23:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:23:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 23:23:12,681 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 23:23:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:12,681 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 23:23:12,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:23:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 23:23:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:23:12,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:12,683 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 23:23:12,683 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:12,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:12,683 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 23:23:12,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:12,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:12,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:12,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:12,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:15,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:15,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:15,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:16,418 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:23:16,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:16,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:16,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:16,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:23:16,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:23:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:23:16,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:23:16,474 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 23:23:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:16,646 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:23:16,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:23:16,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 23:23:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:16,647 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:23:16,647 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:23:16,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:23:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:23:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:23:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:23:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:23:16,651 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 23:23:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:16,652 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:23:16,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:23:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:23:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:23:16,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:16,653 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 23:23:16,653 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:16,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 23:23:16,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:16,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:16,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:16,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:16,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:19,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:19,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:19,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:19,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:19,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:19,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:23:19,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:23:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:23:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:23:19,157 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 23:23:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:19,393 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:23:19,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:23:19,393 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 23:23:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:19,394 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:23:19,394 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:23:19,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:23:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:23:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:23:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:23:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 23:23:19,397 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 23:23:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:19,397 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 23:23:19,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:23:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 23:23:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:23:19,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:19,398 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 23:23:19,399 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:19,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 23:23:19,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:19,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:19,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:19,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:19,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:22,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:22,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:22,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:22,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:22,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:22,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:22,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:22,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:23:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:23:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:23:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:23:22,358 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 23:23:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:22,536 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:23:22,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:23:22,536 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 23:23:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:22,537 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:23:22,537 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:23:22,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:23:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:23:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:23:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:23:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:23:22,542 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 23:23:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:22,542 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:23:22,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:23:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:23:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:23:22,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:22,543 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 23:23:22,543 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:22,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 23:23:22,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:22,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:22,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:22,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:22,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:25,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:25,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:25,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:27,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 23:23:27,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:27,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:27,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:27,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:23:27,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:23:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:23:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:23:27,130 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 23:23:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:27,307 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:23:27,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:23:27,308 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 23:23:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:27,309 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:23:27,309 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:23:27,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:23:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:23:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:23:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:23:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 23:23:27,314 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 23:23:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:27,314 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 23:23:27,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:23:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 23:23:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:23:27,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:27,315 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 23:23:27,315 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:27,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 23:23:27,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:27,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:27,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:27,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:27,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:29,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:29,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:29,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:29,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:29,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:29,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:29,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:29,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:23:29,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:23:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:23:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:23:29,968 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 23:23:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:30,260 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:23:30,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:23:30,261 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 23:23:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:30,262 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:23:30,262 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:23:30,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:23:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:23:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:23:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:23:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:23:30,265 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 23:23:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:30,266 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:23:30,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:23:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:23:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:23:30,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:30,267 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 23:23:30,267 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:30,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 23:23:30,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:30,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:30,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:33,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:33,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:33,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:40,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 23:23:40,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:40,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:40,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:40,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:23:40,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:23:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:23:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:23:40,613 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 23:23:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:40,881 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:23:40,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:23:40,882 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 23:23:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:40,883 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:23:40,883 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:23:40,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:23:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:23:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:23:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:23:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 23:23:40,887 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 23:23:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:40,888 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 23:23:40,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:23:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 23:23:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:23:40,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:40,889 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 23:23:40,889 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:40,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 23:23:40,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:40,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:40,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:40,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:40,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:43,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:43,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:43,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:45,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:23:45,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:45,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:45,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:45,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:23:45,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:23:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:23:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:23:45,551 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 23:23:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:46,057 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:23:46,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:23:46,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 23:23:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:46,058 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:23:46,058 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:23:46,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:23:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:23:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:23:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:23:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:23:46,062 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 23:23:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:46,062 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:23:46,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:23:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:23:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:23:46,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:46,063 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 23:23:46,064 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:46,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 23:23:46,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:46,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:46,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:46,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:46,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:48,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:48,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:48,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:49,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:49,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:49,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:23:49,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:23:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:23:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:23:49,092 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 23:23:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:49,369 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 23:23:49,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:23:49,370 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 23:23:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:49,371 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:23:49,371 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:23:49,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:23:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:23:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:23:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:23:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 23:23:49,375 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 23:23:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:49,375 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 23:23:49,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:23:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 23:23:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:23:49,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:49,376 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 23:23:49,376 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:49,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 23:23:49,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:49,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:49,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:49,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:52,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:52,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:52,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:52,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:52,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:52,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:23:52,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:23:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:23:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:23:52,553 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 23:23:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:52,704 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 23:23:52,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:23:52,705 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 23:23:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:52,706 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:23:52,706 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:23:52,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:23:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:23:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:23:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:23:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 23:23:52,710 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 23:23:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:52,710 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 23:23:52,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:23:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 23:23:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:23:52,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:52,711 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 23:23:52,711 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:52,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 23:23:52,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:52,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:52,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:52,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:55,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:55,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:55,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:57,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:23:57,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:57,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:57,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:57,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:23:57,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:23:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:23:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:23:57,973 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 23:23:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:58,257 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 23:23:58,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:23:58,258 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 23:23:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:58,259 INFO L225 Difference]: With dead ends: 183 [2018-09-30 23:23:58,259 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:23:58,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:23:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:23:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:23:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:23:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 23:23:58,262 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 23:23:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:58,262 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 23:23:58,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:23:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 23:23:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:23:58,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:58,263 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 23:23:58,263 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:58,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 23:23:58,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:58,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:58,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:58,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:01,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:01,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:01,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:01,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:01,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:01,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:01,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:24:01,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:24:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:24:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:24:01,232 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 23:24:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:01,418 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 23:24:01,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:24:01,419 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 23:24:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:01,420 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:24:01,420 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:24:01,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:24:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:24:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:24:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:24:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 23:24:01,424 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 23:24:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:01,425 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 23:24:01,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:24:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 23:24:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:24:01,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:01,426 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 23:24:01,426 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:01,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 23:24:01,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:01,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:01,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:01,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:04,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:04,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:04,629 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:14,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 23:24:14,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:14,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:14,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:14,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:24:14,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:24:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:24:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:24:14,796 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 23:24:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:15,106 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 23:24:15,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:24:15,106 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 23:24:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:15,107 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:24:15,107 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:24:15,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:24:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:24:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:24:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:24:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 23:24:15,110 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 23:24:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,110 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 23:24:15,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:24:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 23:24:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:24:15,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,112 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 23:24:15,112 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 23:24:15,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:18,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:18,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:18,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:20,502 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 23:24:20,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:20,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:20,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:20,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:24:20,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:24:20,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:24:20,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:24:20,567 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 23:24:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:20,803 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 23:24:20,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:24:20,804 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 23:24:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:20,804 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:24:20,805 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:24:20,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:24:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:24:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:24:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:24:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 23:24:20,809 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 23:24:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:20,809 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 23:24:20,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:24:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 23:24:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:24:20,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:20,810 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 23:24:20,811 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:20,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 23:24:20,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:20,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:20,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:20,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:23,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:23,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:23,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:24,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:24,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:24,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:24:24,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:24:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:24:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:24:24,113 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 23:24:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:24,292 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 23:24:24,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:24:24,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 23:24:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:24,294 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:24:24,294 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:24:24,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:24:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:24:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:24:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:24:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 23:24:24,299 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 23:24:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:24,299 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 23:24:24,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:24:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 23:24:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:24:24,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:24,300 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 23:24:24,301 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:24,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:24,301 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 23:24:24,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:24,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:24,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:24,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:28,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:28,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:28,368 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:28,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:28,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:28,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:28,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:28,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:24:28,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:24:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:24:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:24:28,512 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 23:24:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:28,677 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 23:24:28,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:24:28,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 23:24:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:28,678 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:24:28,679 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:24:28,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:24:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:24:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:24:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:24:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 23:24:28,683 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 23:24:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:28,683 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 23:24:28,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:24:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 23:24:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:24:28,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:28,684 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 23:24:28,684 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:28,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 23:24:28,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:28,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:28,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:28,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:32,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:32,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:32,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:35,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 23:24:35,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:35,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:35,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:24:35,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:24:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:24:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:24:35,445 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 23:24:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:35,635 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 23:24:35,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:24:35,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 23:24:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:35,636 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:24:35,637 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:24:35,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:24:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:24:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:24:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:24:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 23:24:35,640 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 23:24:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:35,641 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 23:24:35,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:24:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 23:24:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:24:35,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:35,642 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 23:24:35,642 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:35,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 23:24:35,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:35,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:35,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:35,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:39,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:39,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:39,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:39,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:39,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:39,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:39,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:39,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:24:39,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:24:39,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:24:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:24:39,253 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 23:24:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:39,566 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 23:24:39,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:24:39,567 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 23:24:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:39,568 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:24:39,568 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:24:39,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:24:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:24:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:24:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:24:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 23:24:39,571 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 23:24:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:39,572 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 23:24:39,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:24:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 23:24:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:24:39,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:39,573 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 23:24:39,573 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:39,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 23:24:39,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:39,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:39,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:39,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:42,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:42,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:42,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:55,323 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 23:24:55,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:55,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:55,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:55,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:24:55,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:24:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:24:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:24:55,395 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 23:24:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:55,711 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 23:24:55,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:24:55,712 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 23:24:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:55,713 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:24:55,713 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:24:55,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:24:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:24:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:24:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:24:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 23:24:55,717 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 23:24:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:55,717 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 23:24:55,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:24:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 23:24:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:24:55,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:55,719 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 23:24:55,719 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:55,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 23:24:55,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:55,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:55,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:55,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:59,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:59,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:59,397 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:02,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 23:25:02,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:02,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:02,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:25:02,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:25:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:25:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:25:02,082 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 23:25:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:02,283 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 23:25:02,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:25:02,283 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 23:25:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:02,284 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:25:02,284 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:25:02,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:25:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:25:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:25:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:25:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 23:25:02,288 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 23:25:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:02,288 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 23:25:02,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:25:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 23:25:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:25:02,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:02,289 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 23:25:02,289 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:02,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:02,290 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 23:25:02,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:02,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:06,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:06,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:06,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:06,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:06,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:06,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:25:06,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:25:06,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:25:06,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:25:06,186 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 23:25:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:06,519 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 23:25:06,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:25:06,519 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 23:25:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:06,520 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:25:06,520 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:25:06,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:25:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:25:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:25:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:25:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 23:25:06,523 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 23:25:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:06,523 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 23:25:06,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:25:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 23:25:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:25:06,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:06,524 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 23:25:06,524 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:06,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 23:25:06,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:06,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:06,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:10,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:10,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:10,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:10,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:10,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:10,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:10,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:10,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:25:10,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:25:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:25:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:25:10,552 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 23:25:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:10,882 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 23:25:10,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:25:10,883 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 23:25:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:10,884 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:25:10,884 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:25:10,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:25:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:25:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:25:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:25:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 23:25:10,888 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 23:25:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:10,889 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 23:25:10,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:25:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 23:25:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:25:10,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:10,890 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 23:25:10,890 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:10,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:10,890 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 23:25:10,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:10,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:10,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:14,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:14,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:14,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:19,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 23:25:19,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:19,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:19,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:19,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:25:19,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:25:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:25:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:25:19,130 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 23:25:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:19,399 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 23:25:19,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:25:19,400 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 23:25:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:19,401 INFO L225 Difference]: With dead ends: 207 [2018-09-30 23:25:19,401 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 23:25:19,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:25:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 23:25:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 23:25:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:25:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 23:25:19,404 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 23:25:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:19,404 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 23:25:19,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:25:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 23:25:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 23:25:19,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:19,405 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 23:25:19,405 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:19,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:19,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 23:25:19,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:19,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:19,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:19,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:19,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:23,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:23,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:23,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:23,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:23,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:23,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:23,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:23,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:25:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:25:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:25:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:25:23,244 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 23:25:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:23,487 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 23:25:23,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:25:23,488 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 23:25:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:23,489 INFO L225 Difference]: With dead ends: 209 [2018-09-30 23:25:23,489 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 23:25:23,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:25:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 23:25:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 23:25:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 23:25:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 23:25:23,493 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 23:25:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:23,493 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 23:25:23,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:25:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 23:25:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 23:25:23,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:23,495 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 23:25:23,495 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:23,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 23:25:23,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:23,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:23,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:23,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:23,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:27,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:27,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:27,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:43,746 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 23:25:43,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:43,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:43,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:43,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:25:43,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:25:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:25:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:25:43,834 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 23:25:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:44,071 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 23:25:44,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:25:44,071 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 23:25:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:44,072 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:25:44,072 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:25:44,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:25:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:25:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 23:25:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 23:25:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 23:25:44,076 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 23:25:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:44,076 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 23:25:44,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:25:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 23:25:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:25:44,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:44,077 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 23:25:44,077 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:44,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 23:25:44,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:44,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:44,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:44,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:44,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:48,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:48,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:48,198 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:51,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 23:25:51,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:51,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:51,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:51,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:25:51,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:25:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:25:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:25:51,766 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 23:25:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:52,068 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 23:25:52,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:25:52,069 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 23:25:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:52,069 INFO L225 Difference]: With dead ends: 213 [2018-09-30 23:25:52,069 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:25:52,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:25:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:25:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:25:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:25:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 23:25:52,074 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 23:25:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:52,074 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 23:25:52,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:25:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 23:25:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 23:25:52,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:52,076 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 23:25:52,076 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:52,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 23:25:52,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:52,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:52,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:52,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:56,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:56,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:56,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:56,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:56,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:56,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:25:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:25:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:25:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:25:56,415 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 23:25:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:56,821 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 23:25:56,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:25:56,821 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 23:25:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:56,822 INFO L225 Difference]: With dead ends: 215 [2018-09-30 23:25:56,822 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 23:25:56,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:25:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 23:25:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 23:25:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 23:25:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 23:25:56,827 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 23:25:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:56,827 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 23:25:56,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:25:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 23:25:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:25:56,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:56,829 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 23:25:56,829 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:56,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 23:25:56,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:56,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:56,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:56,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:01,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:01,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:01,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:01,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:01,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:01,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:01,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:01,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:26:01,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:26:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:26:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:26:01,255 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 23:26:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:01,570 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 23:26:01,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:26:01,571 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 23:26:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:01,572 INFO L225 Difference]: With dead ends: 217 [2018-09-30 23:26:01,572 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 23:26:01,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:26:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 23:26:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 23:26:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:26:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 23:26:01,577 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 23:26:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:01,578 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 23:26:01,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:26:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 23:26:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 23:26:01,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:01,579 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 23:26:01,579 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:01,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 23:26:01,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:01,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:01,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:01,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:01,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:05,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:05,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:05,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:11,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 23:26:11,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:11,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:11,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:26:11,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:26:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:26:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:26:11,208 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 23:26:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:11,557 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 23:26:11,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:26:11,558 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 23:26:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:11,559 INFO L225 Difference]: With dead ends: 219 [2018-09-30 23:26:11,559 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 23:26:11,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:26:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 23:26:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 23:26:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 23:26:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 23:26:11,563 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 23:26:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:11,563 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 23:26:11,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:26:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 23:26:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 23:26:11,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:11,565 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 23:26:11,565 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:11,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 23:26:11,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:11,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:11,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:11,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:11,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:15,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:15,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:15,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:16,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:16,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:16,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:16,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:16,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:26:16,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:26:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:26:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:26:16,148 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 23:26:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:16,444 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 23:26:16,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:26:16,444 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 23:26:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:16,445 INFO L225 Difference]: With dead ends: 221 [2018-09-30 23:26:16,445 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:26:16,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:26:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:26:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 23:26:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 23:26:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 23:26:16,448 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 23:26:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:16,449 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 23:26:16,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:26:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 23:26:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:26:16,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:16,450 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 23:26:16,450 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:16,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 23:26:16,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:16,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:16,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:16,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:20,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:20,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:20,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:41,002 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 23:26:41,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:41,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:41,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:41,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:26:41,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:26:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:26:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:26:41,092 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 23:26:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:41,424 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 23:26:41,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:26:41,424 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 23:26:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:41,425 INFO L225 Difference]: With dead ends: 223 [2018-09-30 23:26:41,425 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:26:41,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:26:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:26:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:26:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:26:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 23:26:41,430 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 23:26:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:41,431 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 23:26:41,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:26:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 23:26:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 23:26:41,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:41,432 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 23:26:41,432 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:41,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 23:26:41,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:41,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:41,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:41,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:41,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:45,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:45,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:45,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:49,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 23:26:49,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:49,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:49,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:49,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:26:49,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:26:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:26:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:26:49,969 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 23:26:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:50,393 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 23:26:50,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:26:50,394 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 23:26:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:50,394 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:26:50,394 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 23:26:50,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:26:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 23:26:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 23:26:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 23:26:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 23:26:50,398 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 23:26:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:50,398 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 23:26:50,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:26:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 23:26:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:26:50,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:50,399 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 23:26:50,399 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:50,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 23:26:50,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:50,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:50,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:50,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:50,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:55,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:55,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:55,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:55,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:55,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:55,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:26:55,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:26:55,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:26:55,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:26:55,342 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 23:26:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:55,771 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 23:26:55,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:26:55,771 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 23:26:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:55,772 INFO L225 Difference]: With dead ends: 227 [2018-09-30 23:26:55,772 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 23:26:55,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:26:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 23:26:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 23:26:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:26:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 23:26:55,775 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 23:26:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:55,775 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 23:26:55,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:26:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 23:26:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 23:26:55,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:55,776 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 23:26:55,776 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:55,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 23:26:55,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:55,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:00,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:00,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:00,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:00,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:00,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:00,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:00,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:00,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:27:00,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:27:00,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:27:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:27:00,888 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 23:27:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:01,322 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 23:27:01,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:27:01,323 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 23:27:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:01,323 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:27:01,323 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 23:27:01,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:27:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 23:27:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 23:27:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 23:27:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 23:27:01,327 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 23:27:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:01,327 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 23:27:01,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:27:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 23:27:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 23:27:01,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:01,328 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 23:27:01,328 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:01,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 23:27:01,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:01,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:01,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:01,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:01,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:05,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:05,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:06,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:12,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 23:27:12,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:12,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:12,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:12,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:27:12,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:27:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:27:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:27:12,523 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-30 23:27:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:12,839 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-30 23:27:12,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:27:12,840 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 23:27:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:12,840 INFO L225 Difference]: With dead ends: 231 [2018-09-30 23:27:12,841 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:27:12,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:27:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:27:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 23:27:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 23:27:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-30 23:27:12,845 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-30 23:27:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:12,846 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-30 23:27:12,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:27:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-30 23:27:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:27:12,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:12,846 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-30 23:27:12,847 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:12,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-30 23:27:12,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:12,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:12,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:12,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:17,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:17,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:17,630 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:17,708 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:17,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:17,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:17,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:17,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:27:17,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:27:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:27:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:27:17,780 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-30 23:27:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:18,146 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 23:27:18,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:27:18,146 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-30 23:27:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:18,147 INFO L225 Difference]: With dead ends: 233 [2018-09-30 23:27:18,147 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:27:18,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:27:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:27:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 23:27:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:27:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 23:27:18,150 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-30 23:27:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:18,151 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 23:27:18,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:27:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 23:27:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 23:27:18,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:18,151 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-30 23:27:18,152 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:18,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:18,152 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-30 23:27:18,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:18,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:18,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:23,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:23,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:23,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:49,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 23:27:49,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:49,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:49,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:49,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:27:49,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:27:49,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:27:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:27:49,822 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-30 23:27:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:50,309 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-30 23:27:50,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:27:50,310 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 23:27:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:50,311 INFO L225 Difference]: With dead ends: 235 [2018-09-30 23:27:50,311 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 23:27:50,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:27:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 23:27:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 23:27:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 23:27:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-30 23:27:50,314 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-30 23:27:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:50,314 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-30 23:27:50,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:27:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-30 23:27:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:27:50,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:50,315 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-30 23:27:50,315 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:50,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-30 23:27:50,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:50,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:50,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:50,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:50,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:55,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:55,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:55,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:00,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 23:28:00,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:00,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:00,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:00,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:28:00,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:28:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:28:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:28:00,688 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-30 23:28:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:00,956 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 23:28:00,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:28:00,957 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-30 23:28:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:00,958 INFO L225 Difference]: With dead ends: 237 [2018-09-30 23:28:00,958 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 23:28:00,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:28:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 23:28:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 23:28:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:28:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 23:28:00,963 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-30 23:28:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:00,963 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 23:28:00,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:28:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 23:28:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 23:28:00,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:00,964 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-30 23:28:00,964 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:00,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-30 23:28:00,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:00,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:00,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:06,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:06,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:06,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:06,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:28:06,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:28:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:28:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:28:06,195 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-30 23:28:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:06,537 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-30 23:28:06,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:28:06,537 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 23:28:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:06,538 INFO L225 Difference]: With dead ends: 239 [2018-09-30 23:28:06,538 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 23:28:06,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:28:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 23:28:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 23:28:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 23:28:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-30 23:28:06,543 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-30 23:28:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:06,543 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-30 23:28:06,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:28:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-30 23:28:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 23:28:06,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:06,544 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-30 23:28:06,544 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:06,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-30 23:28:06,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:06,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:06,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:06,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:06,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:11,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:11,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:11,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:11,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:11,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:11,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:28:11,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:28:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:28:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:28:11,856 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-30 23:28:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:12,352 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 23:28:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:28:12,353 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-30 23:28:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:12,353 INFO L225 Difference]: With dead ends: 241 [2018-09-30 23:28:12,353 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:28:12,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:28:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:28:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 23:28:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 23:28:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 23:28:12,357 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-30 23:28:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:12,357 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 23:28:12,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:28:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 23:28:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:28:12,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:12,358 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-30 23:28:12,358 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:12,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-30 23:28:12,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:12,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:12,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:12,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:17,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:17,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:17,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:25,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 23:28:25,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:25,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:25,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:25,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:28:25,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:28:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:28:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:28:25,389 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-30 23:28:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:25,899 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-30 23:28:25,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:28:25,899 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 23:28:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:25,900 INFO L225 Difference]: With dead ends: 243 [2018-09-30 23:28:25,900 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:28:25,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:28:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:28:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:28:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:28:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-30 23:28:25,904 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-30 23:28:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:25,904 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-30 23:28:25,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:28:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-30 23:28:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 23:28:25,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:25,905 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-30 23:28:25,905 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:25,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-30 23:28:25,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:25,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:25,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:25,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:25,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:31,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:31,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:31,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:31,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:31,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:31,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:31,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:31,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:28:31,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:28:31,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:28:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:28:31,330 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-30 23:28:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:31,879 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 23:28:31,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:28:31,879 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-30 23:28:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:31,880 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:28:31,880 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 23:28:31,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:28:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 23:28:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 23:28:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 23:28:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 23:28:31,884 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-30 23:28:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:31,884 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 23:28:31,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:28:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 23:28:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:28:31,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:31,885 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-30 23:28:31,885 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:31,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-30 23:28:31,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:31,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:31,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:31,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:37,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:37,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:37,271 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:09,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 23:29:09,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:09,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:09,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:09,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:29:09,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:29:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:29:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:29:09,776 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-30 23:29:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:10,270 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-30 23:29:10,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:29:10,271 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 23:29:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:10,272 INFO L225 Difference]: With dead ends: 247 [2018-09-30 23:29:10,272 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 23:29:10,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:29:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 23:29:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 23:29:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:29:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-30 23:29:10,275 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-30 23:29:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:10,276 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-30 23:29:10,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:29:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-30 23:29:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 23:29:10,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:10,276 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-30 23:29:10,277 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:10,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:10,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-30 23:29:10,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:10,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:10,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:10,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:10,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:15,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:15,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:15,710 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:22,189 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 23:29:22,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:22,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:22,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:22,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:29:22,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:29:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:29:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:29:22,297 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-30 23:29:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:22,615 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 23:29:22,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:29:22,615 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-30 23:29:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:22,616 INFO L225 Difference]: With dead ends: 249 [2018-09-30 23:29:22,616 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 23:29:22,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:29:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 23:29:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 23:29:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 23:29:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 23:29:22,620 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-30 23:29:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:22,621 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 23:29:22,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:29:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 23:29:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 23:29:22,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:22,621 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-30 23:29:22,622 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:22,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-30 23:29:22,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:22,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:22,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:22,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:22,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:28,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:28,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:28,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:28,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:28,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:28,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:29:28,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:29:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:29:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:29:28,394 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-30 23:29:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:28,787 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-30 23:29:28,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:29:28,788 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 23:29:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:28,788 INFO L225 Difference]: With dead ends: 251 [2018-09-30 23:29:28,788 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:29:28,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:29:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:29:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 23:29:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 23:29:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-30 23:29:28,792 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-30 23:29:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:28,792 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-30 23:29:28,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:29:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-30 23:29:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:29:28,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:28,793 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-30 23:29:28,793 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:28,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-30 23:29:28,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:28,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:28,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:28,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:34,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:34,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:34,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:34,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:34,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:34,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:34,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:34,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:29:34,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:29:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:29:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:29:34,827 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-30 23:29:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:35,384 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 23:29:35,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:29:35,384 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-30 23:29:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:35,385 INFO L225 Difference]: With dead ends: 253 [2018-09-30 23:29:35,385 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:29:35,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:29:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:29:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:29:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:29:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 23:29:35,388 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-30 23:29:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:35,388 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 23:29:35,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:29:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 23:29:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 23:29:35,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:35,389 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-30 23:29:35,390 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:35,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-30 23:29:35,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:35,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:35,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:35,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:35,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:41,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:41,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:41,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:50,876 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 23:29:50,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:50,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:50,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:50,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:29:50,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:29:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:29:50,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:29:50,966 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-30 23:29:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:51,492 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-30 23:29:51,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:29:51,493 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 23:29:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:51,493 INFO L225 Difference]: With dead ends: 255 [2018-09-30 23:29:51,493 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 23:29:51,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:29:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 23:29:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 23:29:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 23:29:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-30 23:29:51,497 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-30 23:29:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:51,497 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-30 23:29:51,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:29:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-30 23:29:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:29:51,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:51,498 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-30 23:29:51,498 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:51,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-30 23:29:51,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:51,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:51,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:51,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:51,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:57,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:57,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:57,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:57,398 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:57,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:57,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:57,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:57,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:29:57,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:29:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:29:57,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:29:57,474 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-30 23:29:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:57,785 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 23:29:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:29:57,785 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-30 23:29:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:57,786 INFO L225 Difference]: With dead ends: 257 [2018-09-30 23:29:57,786 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 23:29:57,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:29:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 23:29:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 23:29:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:29:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 23:29:57,790 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-30 23:29:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:57,790 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 23:29:57,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:29:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 23:29:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 23:29:57,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:57,791 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-30 23:29:57,791 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:57,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-30 23:29:57,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:57,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:57,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:03,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:03,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:03,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:43,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 23:30:43,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:43,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:43,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:43,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:30:43,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:30:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:30:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:30:43,373 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-30 23:30:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:43,935 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-30 23:30:43,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:30:43,936 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 23:30:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:43,936 INFO L225 Difference]: With dead ends: 259 [2018-09-30 23:30:43,936 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 23:30:43,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:30:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 23:30:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 23:30:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 23:30:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-30 23:30:43,941 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-30 23:30:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:43,941 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-30 23:30:43,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:30:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-30 23:30:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 23:30:43,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:43,942 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-30 23:30:43,943 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:43,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-30 23:30:43,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:43,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:43,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:50,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:50,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:50,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:57,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 23:30:57,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:57,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:57,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:57,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:30:57,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:30:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:30:57,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:30:57,742 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-30 23:30:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:58,093 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 23:30:58,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:30:58,094 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-30 23:30:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:58,094 INFO L225 Difference]: With dead ends: 261 [2018-09-30 23:30:58,094 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:30:58,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:30:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:30:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 23:30:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 23:30:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 23:30:58,099 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-30 23:30:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:58,099 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 23:30:58,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:30:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 23:30:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:30:58,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:58,100 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-30 23:30:58,100 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:58,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-30 23:30:58,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:58,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:58,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:58,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:58,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:04,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:04,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:04,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:04,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:04,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:04,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:31:04,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:31:04,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:31:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:31:04,384 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-30 23:31:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:04,950 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-30 23:31:04,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:31:04,951 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 23:31:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:04,951 INFO L225 Difference]: With dead ends: 263 [2018-09-30 23:31:04,951 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:31:04,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:31:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:31:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:31:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:31:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-30 23:31:04,956 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-30 23:31:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:04,956 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-30 23:31:04,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:31:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-30 23:31:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 23:31:04,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:04,957 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-30 23:31:04,958 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:04,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-30 23:31:04,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:04,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:04,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:04,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:04,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:11,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:11,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:11,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:11,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:11,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:11,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:11,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:11,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:31:11,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:31:11,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:31:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:31:11,285 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-30 23:31:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:11,670 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 23:31:11,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:31:11,670 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-30 23:31:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:11,670 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:31:11,671 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 23:31:11,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:31:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 23:31:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 23:31:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 23:31:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 23:31:11,675 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-30 23:31:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:11,675 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 23:31:11,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:31:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 23:31:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:31:11,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:11,676 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-30 23:31:11,676 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:11,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-30 23:31:11,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:11,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:11,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:11,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:11,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:18,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:18,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:18,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:31:29,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 23:31:29,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:29,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:29,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:29,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:31:29,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:31:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:31:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:31:29,921 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-09-30 23:31:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:30,553 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-09-30 23:31:30,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:31:30,553 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-30 23:31:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:30,554 INFO L225 Difference]: With dead ends: 267 [2018-09-30 23:31:30,554 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 23:31:30,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:31:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 23:31:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 23:31:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:31:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-09-30 23:31:30,558 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-09-30 23:31:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:30,558 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-09-30 23:31:30,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:31:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-09-30 23:31:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 23:31:30,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:30,559 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-09-30 23:31:30,559 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:30,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-09-30 23:31:30,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:30,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:30,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:30,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:30,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:36,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:36,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:36,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:37,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:37,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:37,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:37,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:37,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:31:37,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:31:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:31:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:31:37,162 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-09-30 23:31:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:37,877 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 23:31:37,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:31:37,877 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-09-30 23:31:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:37,878 INFO L225 Difference]: With dead ends: 269 [2018-09-30 23:31:37,878 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 23:31:37,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:31:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 23:31:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 23:31:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 23:31:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 23:31:37,883 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-09-30 23:31:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:37,883 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 23:31:37,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:31:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 23:31:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 23:31:37,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:37,884 INFO L375 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-09-30 23:31:37,884 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:37,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:37,884 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-09-30 23:31:37,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:37,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:37,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:37,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:37,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:44,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:44,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:44,536 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:42,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 132 check-sat command(s) [2018-09-30 23:32:42,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:42,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:42,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:42,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:32:42,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:32:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:32:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:32:42,716 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-09-30 23:32:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:43,325 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-09-30 23:32:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:32:43,325 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-09-30 23:32:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:43,326 INFO L225 Difference]: With dead ends: 271 [2018-09-30 23:32:43,326 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:32:43,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:32:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:32:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 23:32:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 23:32:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-09-30 23:32:43,330 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-09-30 23:32:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:43,330 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-09-30 23:32:43,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:32:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-09-30 23:32:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:32:43,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:43,331 INFO L375 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-09-30 23:32:43,331 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:43,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:43,331 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-09-30 23:32:43,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:43,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:43,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:43,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:50,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:50,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:50,122 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:59,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2018-09-30 23:32:59,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:59,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:59,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:59,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:32:59,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:32:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:32:59,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:32:59,955 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-09-30 23:33:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:00,309 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 23:33:00,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:33:00,309 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-09-30 23:33:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:00,310 INFO L225 Difference]: With dead ends: 273 [2018-09-30 23:33:00,310 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:33:00,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:33:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:33:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:33:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:33:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 23:33:00,314 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-09-30 23:33:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:00,314 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 23:33:00,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:33:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 23:33:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 23:33:00,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:00,315 INFO L375 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-09-30 23:33:00,315 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:00,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-09-30 23:33:00,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:00,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:00,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:00,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:00,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:06,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:06,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:06,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:07,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:07,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:07,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:33:07,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:33:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:33:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:33:07,116 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-09-30 23:33:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:07,519 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-09-30 23:33:07,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:33:07,520 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-09-30 23:33:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:07,521 INFO L225 Difference]: With dead ends: 275 [2018-09-30 23:33:07,521 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 23:33:07,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:33:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 23:33:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 23:33:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 23:33:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-09-30 23:33:07,526 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-09-30 23:33:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:07,526 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-09-30 23:33:07,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:33:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-09-30 23:33:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:33:07,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:07,527 INFO L375 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-09-30 23:33:07,527 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:07,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-09-30 23:33:07,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:07,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:07,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:07,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:07,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:14,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:14,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:14,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:14,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:14,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:14,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:14,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:14,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:33:14,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:33:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:33:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:33:14,449 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-09-30 23:33:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:14,965 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 23:33:14,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:33:14,966 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-09-30 23:33:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:14,967 INFO L225 Difference]: With dead ends: 277 [2018-09-30 23:33:14,967 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 23:33:14,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:33:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 23:33:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 23:33:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:33:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 23:33:14,973 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-09-30 23:33:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:14,974 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 23:33:14,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:33:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 23:33:14,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 23:33:14,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:14,975 INFO L375 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-09-30 23:33:14,975 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:14,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-09-30 23:33:14,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:14,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:14,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:14,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:14,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:21,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:21,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:35,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 136 check-sat command(s) [2018-09-30 23:33:35,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:35,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:35,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:35,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:33:35,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:33:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:33:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:33:35,773 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-09-30 23:33:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:36,265 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-09-30 23:33:36,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:33:36,266 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-09-30 23:33:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:36,266 INFO L225 Difference]: With dead ends: 279 [2018-09-30 23:33:36,266 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 23:33:36,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:33:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 23:33:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 23:33:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 23:33:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-09-30 23:33:36,271 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-09-30 23:33:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:36,271 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-09-30 23:33:36,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:33:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-09-30 23:33:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 23:33:36,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:36,272 INFO L375 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-09-30 23:33:36,272 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:36,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-09-30 23:33:36,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:36,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:36,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:36,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:36,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:43,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:43,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:43,273 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:43,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:43,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:43,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:43,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:43,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:33:43,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:33:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:33:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:33:43,465 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. [2018-09-30 23:33:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:43,868 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-30 23:33:43,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:33:43,869 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 276 [2018-09-30 23:33:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:43,870 INFO L225 Difference]: With dead ends: 281 [2018-09-30 23:33:43,870 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:33:43,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:33:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:33:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 23:33:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 23:33:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-30 23:33:43,873 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2018-09-30 23:33:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:43,874 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-30 23:33:43,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 23:33:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-30 23:33:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:33:43,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:43,875 INFO L375 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1] [2018-09-30 23:33:43,875 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:43,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1423796655, now seen corresponding path program 137 times [2018-09-30 23:33:43,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:43,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:43,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:43,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:50,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:50,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:50,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown